Naruto (manga)
A Hidden Leaf resident. He is the leader of the Foundation. The Foundation is a secret organization that takes care of security.  His goal is to become Hokage.  He thought Hiruzen and his followers were weak. Danzo caused many bad things like the Uchiha Massacre. He had Orochimaru add Sharingan eyes and Hashirama's cells to him. When Tsunade was in a coma, Danzo was Acting Candidate Sixth Hokage.  Sasuke killed him.  After he died, the Foundation fell apart at the end of the Fourth Great Ninja War.