Halo: Campaign Evolved NPCs
Master Chief (John-117)
Protagonist Spartan supersoldier.
Voice: Steve Downes
Cortana
AI companion guiding Master Chief throughout the campaign.
Voice: Jen Taylor
Sergeant Avery Johnson
Recurring marine ally, with an expanded role through the new Operation: Meteorite prequel.
Voice: Keston John
343 Guilty Spark / Harmony
Guilty Spark returns with new lines; the same actor also voices the new Operation: Meteorite character Harmony.
Voice: Tim Dadabo