Trestkon/Lawrence
- Accidental Misnaming: Scara will only call him by his correct name once, and that is if he allows Silver Dragon to escape.
- The Hero: His range of heroism can vary from the way you play him all the way from Messianic Archetype and Actual Pacifist levels to a Villain Protagonist who is also an Omnicidal Maniac.
- MacGyvering: The demolitions skill allows him to mix chemicals into Molotov cocktails.
- Noodle Incident: Why he left Forum City in the first place. A few optional conversations give some insight, but the exact details are never revealed. The WorldCorp storyline seems to hint it happened due to a rough period in his real world life, and part of the reason why he joined World Corp was he felt abandoned by his former friends.
- Private Detective: He's hired as one by PDX. It's the player's choice whether he wants to go with it or pursue darker goals.
- Retired Badass: At least in the beginning of the game.
Phasmatis
- Big Good: If you work for PDX, Kashue and Phasmatis are essentially this.
- Cowboy Cop: He's a little too eager to kill criminals... at least if they're working for greedy megacorporations or crazed religious cults....
Deus Diablo
- Flaming Sword: His signature weapon.
- Genius Bruiser: He's a dangerous fighter with several combat-aiding augmentations even without the invulnerability he enjoys as a moderator, and also a capable investigator. He was also the creator of the Firestaff.
- The Lancer: If you work for PDX or Ryan.
King Kashue
- Beware the Nice Ones: Unwilling to resort to violence, but quite capable of kicking your ass if needs be.
- Big Good: If you work for PDX, Kashue and Phasmatis are essentially this.
- Technical Pacifist He'll still mop the floor with you if you kill anyone in the PDX building when allied with them, or cross him when on the second floor while allied with World Corp, but he generally plays this trope straight.
Kylie Griffin
- Back from the Dead: Should the Genre Savvy player decide to kill her in Sol's Bar and then align themselves with PDX, she returns in the final level having been revived by Worldcorp's technology. If you align with Worldcorp, she stays dead.
- Dragon Their Feet: It's possible to fight her after banning Scara if you're doing the "Siding with Ryan" ending.
- Hannibal Lecture: She gives one of these if you kill too many people during the "good" route.
- Tsundere: Shows definitive tsundere tendencies if Trestkon joins World Corp and acts nice towards her.
Scara B. King
Evil Invasion
- The Atoner: He wrote Black ICE, the security program used by WorldCorp, and he founded DXO.
That Guy
Jonas
Really likes cats. Ghandaiah
Beeblequix
- Fanboy: Of Indiana Jones, who his avatar and ingame wallpaper are modeled after.
- Hypocritical Humor: One PM from him criticizes the Deus Ex infolink messages for being too long while going on and on about it.
- Voice with an Internet Connection: Optional, but while the messages delay your ability to save during jump puzzles, they are
worth it.
Ryan
Slicer
- Doesn't Like Guns: Even when he's imprisoned in a cell and you offer him a weapon, he'll only take blades.
- Recurring Boss: If the player doesn't kill him.
Zero Presence
