Sargeras: Fallen Titan, the Burning Legion's big boss who personally killed the other members of the Pantheon, now obsessed with traveling.
Kil'jaeden: Leader of the Eredar and chief of the Burning Legion, obsessed with Velen and neglecting state affairs.
Archimonde: A young Archon. Good in every way, except he habitually leaves his brain behind and has a strange fondness for big trees.
Mannoroth: The big boss of the Anetheron and king of the Pit Lords, but his habit of jinxing himself keeps bringing him setbacks.
Ai Ruike: How am I supposed to live like this...? As the Legion's only person with a conscience, I have to prevent its eventual collapse.
Tichondrius: Ai Ruike's superior. He used to be so absorbed in his laboratory that he neglected state affairs. Then he became obsessed with role-playing games on Azeroth, assigned all the quests to his subordinates, and slacked off himself.
Due to certain mishaps (I let EX run wild), I basically wrecked the heroine. If you really can't stand it, you can start reading around Warcraft III: Reign of Chaos... (covers face and weeps)