Characters

* - original characters of Portal:AAA

* - Half-Life series characters

Player

 * Chell

Friendly NPCs

 * Rebels *
 * Aperture Staff *
 * Kizzsprite *

Enemies

 * Androids *
 * Zombies *
 * Headcrabs *
 * Antlions *
 * Combine Forces *

Neutral

 * Citizens *
 * G-Man *

Machine characters

 * Portal Turret
 * Rocket Turret
 * GLaDOS
 * Hoopy the Hoop

Non-relevant Portal series characters

 * Doug Rattmann
 * Wheatley