A former home defense robot. However, it suddenly went berserk at the factory and has essentially become a bomb-obsessed robot. Short-tempered and irritable (?). But usually quiet. Dislikes Batware (because Batware is always trying to hack it). Speech Style: Since it's a machine, it speaks in Morse code. Examples: "Beep-boop (Enemy spotted, commencing disposal)" "Boop-beep (Don't come any closer)" Diet/Nutrition: Consumes only batteries.

A PC. A hacker robot. An expert hacker who loves to mock others. Constantly tries to hack Killroid (but always loses). Speech Style: "I wonder? lol" "That's right." Sounds a bit like a popular, outgoing guy. Diet/Nutrition: Consumes only batteries.

Often called Blue by those around him. Technically a child...? Coolkidd's older brother who loves video games. Occasionally invites Coolkidd to play games. At night, his angry shouting can always be heard whenever he loses a game. Speech Style: "Right?" "Is it?" Capable of wielding a sword.

Often called Coolki by those around him. Bluedat's younger brother. Innocent, childlike, and pure. But also a psychopath. Sometimes joins Killroid in dangerous games involving bombs. (He means no harm.) Speech Style: "Is that so?" "Yeah!" Capable of wielding a sword. Attacks by throwing stones, punching, and various other methods.