Danzou is a Konoha elder, one of the oldest villagers in Konoha. He is also in charge of the ANBU faction named the Foundation. Later he is appointed as the acting Sixth Hokage (六代目火影, Rokudaime Hokage) after Pain's invasion.
During his fight with Sasuke Uchiha, he is shown to have the eye of Shisui Uchiha under his bandages on his face, while those on his arm cover many other Sharingan eyes for the purpose of using Izanagi, the forbidden technique of rewriting ones fate.
In a world full of ninjas from rivaling villages who more or less have superpowers, how can you not expect there to be epic clashes as these shinobi fight for life and honor? Is your favorite in this list? (Spoilers for Naruto and Naruto: Shippuuden)
Bloodline limits (Kekkei Genkai) are special abilities or bodily constitutions passed down genetically. Here's a complete list of the bloodline limits that play key roles in this series by Masashi Kishimoto.