Naruto (manga)
Also known as Tobi. He is Akatsuki's true leader. He is the main enemy for most of Part II. He was a child during the Third Great Ninja War. He gave his left eye to his teammate Kakashi when he looked like he was about to die. When he looked like he was going to die, Obito was saved by Madara. Madara replaced the damaged parts of his body with Zetsu prosthetics. Obito became Madara's student. Madara made Obitsu watch Kakashi kill Rin Noharu. Obito decided he would use the Tailed Beasts to destroy reality. He wanted to create a perfect world. Obito took Madara's name. He controlled things that led to the creation of the Akatsuki. He also controlled things that led to the Nine Tails' attack on the Hidden Leaf Village. He was angry at his former mentor, Minato.  With his Sharingan, Obito can make it seem like he cannot be touched. He can teleport a long way.  He can also use Wood Style attacks because he has Hashirama's cells.  After Obito is defeated, he gets back the sharingan he gave Kakashi.  Then he died to protect team 7 from Kaguya.  He helped Kakashi in spirit.