Naruto (manga)
Tobi, also known as "Gurguru", is a White Zetsu. He was Obito's exoskeleton while coping with his new body.  Obito based his Tobi form on him. Tobi fought in the Fourth Great Ninja war by taking Yamato's Wood Style. Then he left him once Madara cast Infinite Tsukuyomi. Finally, he crumbled after the jutsu was cancelled. Only Yamato saw him die.