| Hint | Character |
| Betrayed the covenant | |
| Cigar in his mouth all the time. | |
| The bomb expert (ODST) | |
| Naval Commander of UNSC | |
| A.I. (1,2,3) | |
| Spartan 117 | |
| Doesn't speak (ODST) | |
| Gunnery Sargent (ODST) | |
| Prophet who dies in Halo 2 | |
| Leader of the Covenant (2,3) | |
| | Hint | Character |
| The Librarian (1,2,3) | |
| Sniper (ODST) | |
| Giant Plant/Leader of Flood | |
| Leader of UNSC (2,3) | |
| Protagonist (Halo Wars) | |
| Captain of the Spirit of Fire (Halo Wars) | |
| Scientist (Halo Wars) | |
| First appears in Uplift Reserve (ODST) | |
| Chick in Recon Armor (ODST) | |
| A.I. in New Mombasa (ODST) | |
|