Jaken

Jaken is a minor antagonist-turned-anti-hero in the anime/manga series Inuyasha. He is an imp who is extremely loyal to Sesshōmaru, often praising his master's greatness. This loyalty stems from Sesshomaru (indirectly) saving his life when he and his tribe was attacked by a powerful demon.

Although Jaken is not nearly as powerful as his master, he was skilled at wielding the Nintōjō, a staff that can breathe fire. Despite this, he seldom engages in battle. It is often up to him to protect Rin when Sesshomaru can not, much to his annoyance as he shares Sesshomaru's hatred for humans.

Trivia

He is voiced by Yuichi Nagashima in the Japanese version of the anime and Don Brown in the English version.