The Nameless Mod/Characters

Trestkon

 * Badass Longcoat - Possible clothing choice.
 * Canada Eh
 * Cool Shades - Possible clothing choice.
 * Deadpan Snarker
 * Fallen Hero - If you go the "evil" route.
 * Genre Savvy
 * Impossibly Cool Clothes
 * Instant Expert
 * MacGyvering
 * My Name Is Not Durwood - Scara will only call him by his correct name once, and that is if he allows Silver Dragon to escape.
 * Only Sane Man
 * Retired Badass - At least in the beginning of the game.
 * Private Detective - He's hired as one by PDX. It's the player's choice wether he wants to go with it or pursue darker goals.
 * Straight Man
 * The Hero (Range of heroism can vary from the way you play him all the way from The Messiah and Actual Pacifist levels to Villain Protagonist who is also an Omnicidal Maniac)

Phasmatis

 * Big Brother Mentor
 * Cowboy Cop - He's a little too eager to kill criminals... at least if they're working for greedy megacorporations or crazed religious cults....
 * Inspector Lestrade

Deus Diablo

 * Badass Longcoat
 * Flaming Sword
 * James Bondage
 * James Bondage
 * James Bondage

King Kashue

 * Authority Equals Asskicking
 * Badass Longcoat
 * Reasonable Authority Figure
 * 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

 * - Should the Genre Savvy player decide to  and then align themselves with PDX,   If you align with Worldcorp,
 * Dark Action Girl
 * Dragon Their Feet -
 * Hannibal Lecture - She gives one of these if you kill too many people during the "good" route.
 * Psycho Ex Girlfriend - She can be won back, if you go the "evil" route.
 * Psycho for Hire
 * Skippable Boss
 * The Dragon - To Scara B. King.
 * Tsundere - Shows definitive tsundere tendencies if Trestkon joins World Corp and acts nice towards her.

Scara B. King

 * Big Bad - The player can still join his faction, of course.
 * Card Carrying Villain
 * Corrupt Corporate Executive
 * Evilly Affable
 * Jerkass
 * Magnificent Bastard
 * Manipulative Bastard
 * The Chessmaster

Evil Invasion

 * Mission Control
 * The Atoner
 * Voice With an Internet Connection

That Guy

 * Bunny Ears Lawyer
 * Jerkass
 * Mission Control
 * The Cracker
 * Voice With an Internet Connection

Jonas
Really likes cats.
 * Insufferable Genius
 * Jerk With a Heart of Gold
 * The Professor

Ghandaiah

 * Cloudcuckoolander
 * Crouching Moron Hidden Badass - Though he can be defeated easily using subtle means.

Beeblequix

 * Adventurer Archaeologist
 * Ensemble Darkhorse
 * Fan Boy - Of Indiana Jones, who his avatar and ingame wallpaper are modeled after.
 * Genius Ditz
 * 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

 * Plays By His Own Rules
 * Teen Genius
 * Ubermensch

Slicer

 * Doesn't Like Guns - Even when he's imprisoned in a cell and you offer him a weapon, he'll only take blades.
 * Intrepid Reporter
 * Knife Nut
 * Master Swordsman - Yeah, he likes blades a lot.
 * Recurring Boss - If the player doesn't kill him.
 * Skippable Boss
 * Weapon of Choice

Zero Presence

 * Career Killer
 * Cold Sniper
 * Recurring Boss
 * Skippable Boss