Chishima

is a childhood friend of Sagi and Toki.

Bird Country Mystery arc
He is devoted to the siblings, and was willing to ask Konohagakure for help dealing with the Cursed Warrior, despite Toki's (as Sagi) refusal for help. He uncovered Hōki's deception, and, while he was nearly killed in the process, reported his findings to Toki and Naruto. He was almost killed by one of Hōki's attacks, but survived.