Sentoki

is one of the young ninja monks-in-training at the Fire Temple.

Appearance
Sentoki is bald with a scar running across the left side of his head and dark eyes. He wears the standard attire of the ninja monks.

Hidan and Kakuzu Arc
Sentoki was away when Akatsuki members Hidan and Kakuzu attacked the temple. He returned immediately after, finding the temple in ruins and the Akatsuki members as they were just about to leave. He then subsequently went to Konoha to notify them of the attack and requested for help.

He is one of only four known monk survivors in the attack, along with Bansai, Zenza, and Sora.

Trivia

 * Sentoki's name means "a thousand hours" or "a thousand times".