Enma

Enma is the king of monkeys, he made a summoning contract with the Third Hokage. His strength is abnormally great, even in comparison to some shinobi. His ultimate technique with the third is the Adamantine Nyoi. when the Third performed Shiki Fuujin, Enma wasnt able to block the sword that stabbed Sarutobi, and later removed the blade. He had a grudge for Orochimaru and the day Sarutobi failed to kill him.