Waru is an evil ninja who plans to help Tobi with the Fourth Shinobi World War. He is a ninja who has a crazy personality, which is usually his downfall. Waru had no idea Tobi was Obito, and Waru despised Obito as a child, but when Tobi was unmasked he had no choice but to listen to Obito because he knew if he didn't he would be killed. Waru currently fights off Konoha ninjas so Tobi isn't defeated. His name translates into evil in japanese.