is an S-rank missing-nin formerly of Sunagakure. He was held up as a member of the Taiken during the Second Shinobi World War for which he was called thanks to his mastery of sealing techniques. He later became known as after his sister's death, being the only known user that remained. Kaasage has had numerous false identities in order to cover his track leading many people to believe that Kaasage isn't his true name. He is the sole leader of the Eien a group of zombified shinobi that serve his every whim when under the influence of his dark-natured chakra.