He is a sentient computer glitch that takes the appearance of a cartoonish grey bunny with pitch black eyes, no mouth, and two blue streaks running down his cheeks from his eyes. He also wears black overalls with a gray shirt underneath. Blu is very defensive and rude, but he is only like that until you start being nice to him. He is unable to leave his computer, but he can transfer over to other devices. Blu is usually rude and all swift with his words around people he doesn’t know.