Bansai

was an elder ninja monk in the Fire Temple and one of only three known survivors of the Akatsuki attack on the temple. He is currently retired.

Twelve Ninja Guardians Return arc
Not following the manga, Bansai debuted in this arc. When Naruto and his team arrived at the Fire Temple, Yamato introduced him to the old man.

Hidan and Kakuzu arc
When Chiriku was killed at the Fire Temple, Asuma Sarutobi and his team went there to gather information on Akatsuki. Bansai, worried for the health of the four shinobi, said a prayer. This made Asuma go into a trance and see the spirit of his dead comrade Chiriku.