1. 343 Guilty Spark – A somewhat eccentric Forerunner AI, this Monitor of Installation 04 played a crucial role in the series, often interacting with the Master Chief.

2. Captain Jacob Keyes – Integral to the series, showcasing leadership and sacrifice.

3. Dr. Catherine Halsey – Creator of the Spartan-II program, her story is riddled with moral dilemmas.

4. Cortana – Central to the story, this AI has a deep bond with Master Chief.

5. Didact (Ur-Didact) – A central antagonist, his narrative reveals ancient rivalries and Forerunner mysteries.

6. Gravemind – The collective consciousness of the Flood, playing a pivotal antagonist role.

7. Jameson Locke – Former ONI operative and a Spartan-IV, prominently featured in “Halo 5: Guardians”.

8. Jul ‘Mdama – A Sangheili leader and antagonist, significant in the post-Covenant era.

9. Master Chief (John-117) – The primary protagonist of the Halo series. A Spartan-II super soldier known for his role in fighting the Covenant, Flood, and other threats to humanity.

10. Commander Miranda Keyes – Courageous and dedicated, she played a crucial role throughout the series.

11. Prophet of Mercy, Regret, Restraint, Tolerance, Truth – Hierarchs of the Covenant, with Truth being the primary antagonist in the original trilogy.

12. Sarah Palmer – Sarah Palmer is a prominent Spartan-IV and leader of Fireteam Osiris.

13. Sgt. Major Avery Junior Johnson – An important supporting character who fights alongside Master Chief in multiple games.

14. The Arbiter (Thel ‘Vadam) – Thel ‘Vadam is an important Sangheili leader who plays a pivotal role in the later games.

15. Librarian – An ancient Forerunner, playing a significant role in the universe’s lore.

16. Warden Eternal – An antagonist from “Halo 5”, a Forerunner construct.

17. 2401 Penitent Tangent – Monitor of Installation 05, captured by the Gravemind. Its failure to prevent the Flood outbreak caused significant issues. 

18. Adjutant Reflex – Lesser-known Forerunner AI. Associated with the mysterious return of the Forerunners.

19. Adriana-111 – A Spartan-II, part of Gray Team. Specialized in reconnaissance and stealth operations.

 20. Aggressor Sentinels – Flying Forerunner machines, designed for the security and maintenance of their installations.

21. Aigburth – Not a mainline character but adds depth to the expansive lore.

22. Akio Watanabe – A minor UNSC character with indirect connections to the core narrative.

23. Aldo Sorvad – Known for his research at Reach and tragic end.

24. Ali – A character that provides insight into the universe’s political and societal aspects.

25. Alice-130 – Member of Red Team, known for her appearance in “Halo Wars” series.

26. Al-Thani – A peripheral character, hinting at Earth’s political landscapes in the 26th century.

27. Alys Vallum – Forerunner era character, integral to understanding their complex culture.

28. Andra-D054 – A Spartan-III, she showcases the differences between Spartan generations.

29. Andy Remo – Adds a human touch, representing ordinary people in a galaxy at war.

30. Annabelle Richards – Contributes to the expanded universe’s depth and intricacy.

31. Anton-044 – A Spartan-II, showcasing the camaraderie and dedication of these supersoldiers.

32. Argyle – A character bringing an additional layer to the story.

33. Arris Le – A significant player in the Shadow of Intent story.

34. Ash-G099 – A Spartan-III, demonstrating the dedication and training of this generation.

35. Asum ‘Mdama – A Sangheili, representing the internal conflicts and politics of his species.

36. Atriox – A Jiralhanae leader of the Banished, his brutality and cunning make him a formidable enemy.

37. Austin Boyd – Adds depth to the stories centered around the UNSC and their operations.

38. Axel – Brings in a unique perspective and set of experiences.

39. Ayit ‘Sevi – Sangheili spy, representing the factions and political maneuverings in the Covenant’s aftermath.

40. Bai Kai Wattinree – A Fleetmaster, showcases the Sangheili’s military prowess.

41. Ball – Adds a quirky element to the narrative.

42. Bal’Tol ‘Xellus – Demonstrates Sangheili honor and martial skill.

43. Bapap – A Grunt, representing the lower caste of the Covenant hierarchy.

44. Barca – Adds depth and variety to the Sangheili characters.

45. Bartalan Craddög – A character that enriches the universe’s societal and cultural aspects.

46. Ben – Provides a civilian viewpoint, allowing players to understand the universe’s broader implications.

47. Benjamin Giraud – A journalist whose investigative stories shed light on the UNSC and ONI secrets.

48. Bero ‘Kusovai – A Sangheili warrior, representing the various factions within their species.

49. Bjorn & Bjorn Birger – Offering more depth into the human side of the story.

50. Black Box (BB) – A unique AI, known for its intelligence and mysterious origin.

51. Black Team – Elite Spartans, emphasizing teamwork and dedication.

52. Blademaster – Showcases martial expertise, highlighting different combat styles.

53. Blunt Instruments – A covert operations team, delving into the shadowy side of intergalactic warfare.

54. Bobby Kodiak & Family – A familial perspective, emphasizing the war’s impact on family units.

55. Bol ‘Rojkae – Deepens the narrative around the Sangheili.

56. Bornstellar – A young Forerunner, central to understanding the mysteries of this ancient race.

57. Boru’a’Neem & Family – Offers insights into the universe’s family dynamics and relationships.

58. Bostwick – A rebel, shedding light on the factions opposing the UNSC.

59. Brink – Delving into personal stories and tragedies of the war.

60. Brother in Arms – Emphasizing camaraderie and brotherhood.

61. Cal-141 – Showcasing Spartan dedication and sacrifice.

62. Cameron – Another layer to the human stories within the universe.

63. Carlo Hoya – A look into the life and challenges of a Spartan-IV.

64. Carol “Foe Hammer” Rawley – A steadfast pilot, representing the UNSC’s non-Spartan heroes.

65. Carris-137 – Providing a deeper look into the Spartan-II program.

66. Carrol Hopper – Highlights the civilian scientists and their contributions.

67. Carter-A259 – Noble Team’s leader, embodying dedication and sacrifice.

68. Casey, Cassandra & Family – Represents the broader impact of war on families.

69. Castor – A character with motives that reveal more about the universe’s internal conflicts.

70. Catalog – A repository of information, crucial for lore enthusiasts.

71. Cerny – Offering more human stories and experiences.

72. Cethegus – Delving deeper into the Forerunner saga.

73. Chakas – A bridge between ancient humanity and Forerunner technology.

74. Charles Vane – Adding variety and depth to the UNSC’s ranks.

75. Chase Jones – Showcasing the universe’s bravery and dedication.

76. Cirilo – Offers insights into various human experiences in the universe.

77. Colleen – A lens into the daily lives and challenges of those in the universe.

78. Colony – A unique Lekgolo entity, exploring non-traditional forms of life.

79. Connor Brien – Adds depth to the rich tapestry of characters.

80. Cook – Represents the unsung heroes of the universe.

81. Cortana’s Guardians – Powerful constructs, pivotal to the current events of the Halo universe.

82. ‘Crecka – Deepens the understanding of various Covenant species.

83. Crystal Security – Delving into the private sectors and security forces within the universe.

84. Cynthia Diggs – Emphasizes the wide variety of roles within the UNSC.

85. Daddy – A character adding emotional depth to the narrative.

86. Daedalus – Expands upon the universe’s mysteries and hidden stories.

87. Dak – Another view into the diverse set of experiences in the universe.

88. Dalen – Reveals more about the societal and cultural layers.

89. Dalton – Adds more human elements and personal stories.

90. Danforth Whitcomb – Showcases UNSC leadership during pivotal moments.

91. Dante-G188 – A Spartan-III, his story adds depth to their sacrifices.

92. Darak – Reveals more about the universe’s broader factions and motivations.

93. Darrow – Providing a deeper look into the universe’s human side.

94. David Agnoli – Offers insights into the civilian stories and their perspectives.

95. David-010 – A lens into Spartan training and experiences.

96. Dee Kilroy – Adds another layer of personal tales and experiences.

97. Delgado – A rich source of understanding about civilian life.

98. Demos – Showcases combat prowess and strategic brilliance.

99. Deral – Adds a unique perspective on the universe’s myriad experiences.

100. Deserted Squad – Provides a look into the challenges and tales of survival.

101. Dex – Adds depth to the universe’s personal stories.

102. Dimitri Zheng – Adds layers to the UNSC’s experiences and challenges.

103. Dino – Offers a civilian perspective on life in the Halo universe.

104. Director Boyd – Highlights the bureaucratic and leadership challenges in such a vast universe.

105. Drifts Randomly – A Huragok (Engineer), provides insights into this non-combatant, technically skilled species.

106. Dutch – As part of the ODST squad, showcases bravery and skill on the front lines.

107. Dying Star – Expands on Forerunner technology and mysteries.

108. E-Day Gear – Offers a perspective on significant events and challenges in the universe.

109. Eagle Team – Elite Spartans, their story exemplifies teamwork.

110. Eamon – Adds another layer of depth and understanding to human stories.

111. Dimah Tchakova – UNSC officer; her perspectives add layers to the wider Halo narrative.

112. Donoma – Offers unique insights into the universe’s various experiences.

113. Douglas Rutland – Highlights civilian stories within the Halo universe.

114. Douglas-042 – A Spartan-II, a member of Red Team, known for his appearance in “Halo Wars”.

115. Dr. Catherine Halsey – A repeat from the previous list; she’s the brilliant mind behind the Spartan-II program.

116. Dying Star – Previously mentioned; expands on the Forerunner technology and mysteries.

117. Echo of Wrath – Delve deeper into Forerunner mysteries and their AI systems.

118. Ed – Representing the diverse human stories within the universe.

119. Edward Buck – An Orbital Drop Shock Trooper (ODST), later becomes a Spartan. A key character in several Halo games.

120. Edward Buck’s father/mother – These characters add personal depth to Buck’s background.

121. Edward Davis – Part of the Spartan Ops narrative; highlights Spartan heroism.

122. Egan – Adds depth to the human stories within the narrative.

123. Eith Mor – Providing a broader perspective on universe events.

124. Elias Holt – Delves into the military dynamics and challenges.

125. Elise – Another lens into the various human experiences.

126. Ellen Anders – A key scientist character in the “Halo Wars” series.

127. Ellen Dowski and family – Personal stories that add depth to the universe.

128. Ellie Bloom – Offers insights into civilian life during these tumultuous times.

129. Ellie-G070 – Highlights the life and experiences of a Spartan-III.

130. Emile-A239 – A fierce Spartan from Noble Team, known for his skull-engraved visor.

131. Endless Summer – An AI character that expands upon the AI-human dynamics in the universe.

132. Eric Raeburn – Delves into UNSC stories and challenges.

133. Erin Lynn – Another look into the human experiences within the universe.

134. Escharum – A leader of the Banished; represents the evolving threats in the Halo universe.

135. Evan Phillips – An xenoanthropologist with deep insights into the Sangheili culture.

136. Exuberant Witness – A Monitor in the Forerunner installations; adds to the series’ lore.

137. Fal ‘Chavamee – Sangheili stories highlighting their honor-based society.

138. Fek – Represents the Grunt species and their unique place in the Covenant.

139. Fel ‘Vadam – Expands on Sangheili tales and their societal dynamics.

140. Felicia Sanderson – UNSC perspective, delving into military operations.

141. FERO – A mysterious character with links to ONI and the insurrectionists.

142. Fhajad-084 – A Spartan-II, whose story showcases the physical toll of Spartan enhancements.

143. Fireteam Osiris – An elite team of Spartans introduced in “Halo 5: Guardians”.

144. Fist of Rukt – A powerful Brute weapon, symbolizing Jiralhanae strength.

145. Forge – A sergeant from “Halo Wars”, known for his bravery and sacrifice.

146. Forthencho – An ancient human warrior; reveals older rivalries between humans and Forerunners.

147. Franklin Mendez – The tough trainer of the Spartans, instrumental in their rigorous upbringing.

148. Fred-104 – Part of Blue Team and close ally to Master Chief.

149. Gabriel Thorne – A Spartan-IV, played a role in the “Halo 4” Spartan Ops missions.

150. Gail Purdy – Provides insight into the various roles within the UNSC.

151. Gek ‘Lhar – A Sangheili warrior, adding to the complexity of the species.

152. Gene Lindsey – Highlights the diversity of human stories.

153. Giancarlo Sorvad – Adds depth to the archaeological aspects of the series.

154. Giorgio – Expands on the human stories and experiences.

155. Gough – Delves into UNSC operations and challenges.

156. Governor Sloan’s Assistant – Highlights the administrative dynamics of human settlements.

157. Grace-093 – A Spartan-II, showcasing the dedication and sacrifices of these elite warriors.

158. Grant – Provides a look into military operations.

159. Greene – Represents the UNSC’s brave soldiers.

160. Gregory Ramos – Expands on the UNSC’s operations and personnel.

161. Gretchen Ketola and Navarro – UNSC personnel, providing insights into military operations.

162. Grizzle – Offers a look into the varied human experiences.

163. Halsey’s Journal AI – Expands on Dr. Halsey’s personal insights and recordings.

164. Han & Harald Geirsson – Provides depth to the broader universe narrative.

165. Havers – Delves into the challenges faced by UNSC soldiers.

166. Hazel-A302 – A Spartan-III, emphasizing the training and dedication of these warriors.

167. Heng and family – Adds a familial dimension to the universe.

168. Henry Gibson, Glassman, Lamb – Each offers unique insights into the lives of people in the Halo universe.

169. Holly Tanaka – A Spartan-IV, her background and challenges are explored in extended lore.

170. Hopeful Sleep – Delving deeper into Forerunner mysteries.

171. Hopper’s family – Expanding on familial stories in the universe.

172. Horatio Fry & Horrigan – Offers diverse perspectives on human life.

173. Howard Graves – Highlights the diversity of roles within the UNSC.

174. Hoya – A Spartan-IV, emphasizing the new generation of Spartans.

175. Huki & Huki ‘Umamee – Adds to the diversity of alien experiences in the universe.

176. Hyperius – Highlights the Banished faction’s strength and strategies.

177. Ignatio Delgado – A key figure in “Halo: Contact Harvest”, provides insights into early Covenant-human interactions.

178. Ilsa Zane – A rogue Spartan, highlighting challenges in the Spartan program.

179. Imra ‘Vadum & Indrik ‘Bladamee – Sangheili characters providing depth to their species.

180. Inna Volkov & Inslaan ‘Gadogai – Expanding on the diversity of stories in the universe.

181. Installation 04 Monitor – Highlights the Forerunner technology and their role in the Halo rings.

182. Intrepid Eye – An ancient AI, offering more lore about the Forerunner era.

183. Iona – An AI character, emphasizing the AI-human dynamics.

184. Irene Morikis – Delving deeper into UNSC operations.

185. Isaac Polanski’s family – Expanding on familial and personal stories.

186. Isaac-039 – A Spartan-II, offering more depth into their training and experiences.

187. Isabel – An AI character, highlighting the intricate AI dynamics.

188. Isla Zane’s family – Delving deeper into the complex personal histories of characters.

189. Jack Hopper – Part of the wider Halo universe, highlighting personal tales.

190. Jacob Keyes’ parents – Add depth to Captain Jacob Keyes’ background.

191. Jai-006 – A Spartan-II, involved in various operations.

192. Jake Courage – Represents the human experiences amidst interstellar conflict.

193. James Lee – A look into the lives of UNSC soldiers.

194. Jameson Locke’s mother – Adds a familial dimension to Locke’s character.

195. Janey Ray – Part of the civilian tales that pepper the universe.

196. Janissary James – Another lens into human experiences and challenges.

197. Jared Miller – UNSC personnel, adding depth to the organization’s operations.

198. J’door – Alien character providing depth to the universe’s species.

199. Jeffries – A look into UNSC operations and challenges.

200. Jega ‘Rdomnai – A Sangheili warrior, showcasing the honor and might of the species.

201. Jerome-092 – A Spartan-II from Red Team, prominently featured in the “Halo Wars” series.

202. Jiralhanae (species) – More commonly known as Brutes, they are a part of the Covenant.

203. Jiralhanae Bodyguard/Chieftain – Showcases the might and hierarchy of the Brute species.

204. John Forge’s daughter – Adds personal depth to Sergeant John Forge’s character.

205. Jon, Jon Aiken, Jonas – Various human perspectives, enriching the narrative’s depth.

206. Jorge-052 – A Spartan-II and heavy weapons specialist of Noble Team in “Halo: Reach”.

207. Joseph M. Poteet & Joseph-122 – Delving deeper into UNSC operations and the Spartan program.

208. Joshua-029 – A Spartan-II, further showcasing the elite warriors’ dedication.

209. Julian Waters & Julian-G209’s family – Personal stories adding depth to the universe.

210. Juliet & Jun-A266 – Jun is a Spartan-III and Noble Team’s sniper in “Halo: Reach”.

211. Kaaranese & Kaidon – Sangheili characters adding depth to their species.

212. Kai-125’s family – Adding a familial perspective to Spartan Kai-125.

213. Kai-L019 – A Spartan-III, adding depth to their stories.

214. Kalmiya – An earlier AI by Dr. Halsey, adding dimension to AI-human dynamics.

215. Karl Zakovksy & Karvinas – UNSC personnel stories, providing insights.

216. Kasha ‘Hilot – A Sangheili character, representing their complex societal dynamics.

217. Kat-B320 – A Spartan-III, key member of Noble Team in “Halo: Reach”.

218. Katrina & Keeper of the One Freedom – Offering diverse perspectives in the universe.

219. Keflus & Kelly Shaddock – Delving deeper into human stories.

220. Kelly-087 – A Spartan-II and a close ally to Master Chief in several narratives.

221. Kerbasi & Kevin Morales – Expanding on human experiences in the universe.

222. Kig-Yar (species) – Known as Jackals in the games, they play various roles in the Covenant.

223. Kincaide & Kinsler – UNSC personnel, providing deeper insights.

224. Kodiak & Kodiak Nowak – Diverse human tales in the Halo universe.

225. Kojo “Romeo” Agu & family – An ODST sharpshooter, and later a Spartan-IV.

226. Kola ‘Baoth & family – Sangheili characters adding depth to their stories.

227. Lak ‘Vadamee & Lars – Delving deeper into the complex Sangheili society.

228. Lasky’s brother & Layla – Personal stories enriching the narrative.

229. Lekgolo (species) – Known as Hunters, they are a part of the Covenant.

230. Leonard & Leonard Gillespie – Expanding on UNSC operations.

231. Let ‘Volir – A Sangheili Shipmaster, providing insights into their naval operations.

232. Li-008 & Lian Devereaux – Spartans providing depth to the elite warriors’ stories.

233. Lighter Than Some – A Huragok, known for their engineering skills.

234. Linda Pravdin’s family – Adding depth to Spartan Linda-058’s background.

235. Linda-058 – A Spartan-II and expert sniper, ally to Master Chief.

236. Little Bit & Lopez – Diverse characters adding to the universe’s richness.

237. Lopis’ father & Lord Hood – Fleet Admiral Hood is a key UNSC leader.

238. Lord of Admirals – An ancient human leader, offering historical depth.

239. Lucy-B091 – A Spartan-III, her tales delve into the Spartan-III program’s nuances.

240. Luk ‘Rojkae & Luther Mann’s family – Diverse characters enriching the narrative.

241. Mack & Madsen – Further exploring the stories of the UNSC.

242. Mahlo ‘Turagg & family – Sangheili tales offering depth to their society.

243. Maisie & Mara – Expanding on the universe’s human experiences.

244. Margaret Parangosky – The head of ONI, providing insight into its covert operations.

245. Margaret-053 & Maria-062 – Spartans, each with their own unique tales.

246. Mark-G313 & Martinelli – Expanding on Spartan and human experiences.

247. Martu ‘Varnak & Mason Hundley – Offering both alien and human tales to deepen the lore.

248. Mayhem – Lesser-known character within the Halo universe.

249. Melissa – An AI fragment that played a role in the “I Love Bees” ARG promotion for “Halo 2”.

250. Melissa McKay – A Marine officer involved in battles against the Covenant.

251. Melody Azikiwe – Minor character in the Halo lore.

252. Mendicant Bias – An ancient Forerunner AI who originally betrayed the Forerunners but later sought redemption.

253. Merg Vol – A Covenant leader during the events of “Halo 4”.

254. Michael “Mickey” Crespo – A member of the ODSTs and later affiliated with insurrectionist groups.

255. Michael Baird & Michael Horrigan’s mother – Adds depth to the background of characters in the series.

256. Michael Sullivan – An ONI officer.

257. Michael Sullivan’s family & Mike-008’s family – Adds a familial dimension to the characters.

258. Mike-120 & Miki-010 – Spartans with their own unique tales.

259. Mken ‘Scre’ah’ben – A San’Shyuum political figure in the post-war era.

260. Monik & Moradi – Lesser-known figures in the expansive lore.

261. Morgan & Morning Riser – Unique perspectives in the universe.

262. Murtag Nelson – Minor character in the series.

263. Naiya Ray & family – Offers depth to the Spartan Naiya Ray’s background.

264. Nakai ‘Lodamee & Nakai Vadam – Sangheili characters showcasing their species’ depth.

265. Nicole-458 – A Spartan-II who appeared in the game “Dead or Alive 4”.

266. Nizat ‘Kvarosee – A Covenant Shipmaster.

267. Noble Six (B312) – The protagonist of “Halo: Reach”, a Spartan-III who played a crucial role in the defense of Reach.

268. Nor Fel & Novo – Characters that add depth to the narrative.

269. N’tho ‘Sraom – A Sangheili character in “Halo 3” co-op.

270. Nyeto & Odua – Lesser-known figures in the lore.

271. Offensive Bias – A Forerunner AI created to counter Mendicant Bias.

272. Okro ‘Vagaduun – A Sangheili character.

273. Olivia-G291 – A Spartan-III and member of Fireteam Osiris.

274. Olympia Vale – Human linguist and a member of Fireteam Osiris.

275. ONI Acrisius AI – Associated with ONI operations.

276. Orna ‘Fulsamee – Sangheili shipmaster from “Halo: The Flood”.

277. Orrin & Orsun – Lesser-known figures adding depth.

278. Osman & family – Serin Osman is a former Spartan-II trainee who became the head of ONI.

279. Otar ‘Bemet & Otto Seinmann – Characters that expand the narrative.

280. Oza & Panom – Part of the vast character list.

281. Parala ‘Ahrmonro & Parg Vol – Characters from the Covenant.

282. Paul DeMarco – A member of Fireteam Majestic.

283. Paul Russell & Pavium – Characters that enrich the Halo universe.

284. Pete & Petra Janecek – Petra is a journalist in the Halo universe.

285. Petra Janecek’s family – Adds a familial dimension to Petra’s character.

286. Philip Kindred & Pilo ‘Rojkae – Minor characters in the lore.

287. Pinarayi & Ponder – Lesser-known figures.

288. Pratley & Prelate – Adding depth to the expansive universe.

289. Promise of Dawn & Prone to Drift – Prone to Drift is a Huragok (Engineer).

290. Quartermaster – A figure associated with supplies and logistics.

291. Rafael Esquival & Ragnarök – Characters adding depth.

292. Ralph-103 – A Spartan-II with a unique story.

293. Ran ‘Mdama – A character from the Sangheili species.

294. Randall-037 – Former Spartan-II who later became a regular human.

295. Rani Sobeck & Ray Kurzig – Characters that provide unique perspectives.

296. Red Horse’s captain & Redmond Venter – Characters in various Halo stories.

297. Reza Linberk & family – Adding familial dimensions to characters.

298. Rich & Richard Barclay – Characters from the extended lore.

299. Richard Lash & Richard Sekibo – Figures that add narrative depth.

300. Rion Forge – Daughter of Sergeant John Forge.

301. Ripa ‘Moramee – The primary antagonist of “Halo Wars”.

302. Riser & Rivers – Riser is a human from ancient times encountered in “Halo: Cryptum”.

303. Roams Alone – A Huragok character.

304. Roaring Lion & Robert Watts – Characters from diverse stories.

305. Roebuck & Rojka ‘Kasaan – Part of the Halo narrative.

306. Roland – An AI aboard the UNSC Infinity.

307. Romero-092 & Rosenda-A344 – Spartans with their unique narratives.

308. Rowan Daoud’s parents – Provide familial background for the character Rowan Daoud.

309. Roy Koel – A minor character from the extended universe.

310. Rtas ‘Vadum – Commonly known as “Half-Jaw”, he’s a Sangheili Shipmaster and a key ally in the later Halo games.

311. Ruk Ariaustin & Ruwan Ackerson – Characters from the Halo narrative.

312. Saal & Sal – Lesser-known figures in the universe.

313. Sali ‘Nyon – A Sangheili zealot and follower of Jul ‘Mdama.

314. Samrat & Samuel-034 – Samuel-034 was the first Spartan-II casualty.

315. Sasa ‘Kellum & Sasuun ‘Grtamee – Sangheili characters with unique roles.

316. Sav Fel & Scud – Characters that add depth to the series.

317. Scyllion & Sedavian – Lesser-known figures.

318. Seeker of Truth – A Covenant ship.

319. Sergeant Major Avery Junior Johnson – A beloved character, Johnson is a key figure in the Halo series and close ally to Master Chief.

320. Serin Osman & family – A former Spartan-II trainee who became the head of ONI.

321. Sheila Polaski & Sheila-065 – UNSC personnel.

322. Shenyun & Shi Kai Wang – Characters from extended lore.

323. Shinsu ‘Refum – A Sangheili character.

324. Shr’Wak & Sif – Add depth to the universe.

325. Sif Jar Wattinree & Sleeping Princess – Characters from various stories.

326. Sloan – An AI governing the settlement of Meridian.

327. Solitude – An AI antagonist from the Halo graphic novels.

328. Soth ‘Rajinai & Spartan Davis – Spartan Davis is a Spartan-IV from “Halo: Spartan Assault”.

329. Spartan Owen-B096 & Spartan Palmer – Spartan Owen is a Spartan-IV, and Palmer is a notable Spartan-IV leader.

330. Spartans’ Drill Instructor – Provides training to Spartans.

331. Stephen & family – Characters from the extended universe.

332. Sur ‘Ranak & Tartarus – Tartarus is a Jiralhanae Chieftain and primary antagonist in “Halo 2”.

333. Tart-Cart & Taylor “Dutch” Miles – Dutch is a member of the ODST team from “Halo 3: ODST”.

334. Tedra Grant & Tejo – UNSC personnel.

335. The Assembly & The Confirmer – Groups and characters in the series.

336. The Didact (Ur-Didact) – Primary antagonist of “Halo 4”, a Forerunner military leader.

337. The Gracious Interlocutor & The Harbinger – Characters adding depth.

338. The Minister series & The Seeker – Various Covenant and Forerunner officials.

339. The Timeless One & Thomas Lasky – Lasky is a key figure in the UNSC and appears in “Halo 4” and “Halo 5”.

340. Thon series & Tiro -Zuka ‘Zamamee & Zurel – Characters with their unique roles in the series.

341. Tom series & Tovarus – Characters that provide unique narratives.

342. Tul series – Sangheili characters and their background.

343. Unggoy – Commonly known as Grunts, they are the lowest-ranking soldiers in the Covenant.

344. Ussa ‘Xellus & Usze ‘Taham – Sangheili characters.

345. Vaardma & ‘Vadam – Figures from the Sangheili species.

346. Vata ‘Gajat & Vernon – Characters from various stories.

347. Veronica Dare & family – A major character from “Halo 3: ODST”.

348. Veta Lopis – A detective and protagonist from Halo: Last Light.

349. Victor-101 & Vinh-030 – Spartans with their unique tales.

350. Voridus & Wallace Fujikawa – Characters and scientists adding depth.

351. Wendell, Whisper, & Whispering Trees – Characters from the expanded universe.

352. William series – UNSC personnel.

353. Xam & Xytan ‘Jar Wattinree – A major Sangheili figure.

354. Y’gar ‘Pewtrunoee & Yance – Characters that enrich the universe.

355. YapYap the Destroyer – A unique Unggoy character.

356. Yeardley & Yeg – Various figures in the Halo universe.

357. Yuso, Zhao Heng Lopez & Zhar – Characters from the extended universe.

358. Zo Resken & Zon ‘Vadum – Sangheili figures from various stories.