Benten

is a ninja who was helping Akaboshi to collect the Tsuchigumo clan's kinjutsu.

Appearance
He also has a rather androgynous appearance.

Six-Tailed Beast arc
Akaboshi, Benten, Nangō, and Chūshin make for Mount Katsunagi in search of the Tsuchigumo clan's kinjutsu. They manage to destroy the barrier around the mountain and make their way up. They could not find the jutsu anywhere and ran into Tonbee, whom the group defeated quickly. They discover that Hotaru has the jutsu and they begin searching for her.

Trivia

 * is a shorter version of the name, the Japanese name for the goddess Saraswati. Benzaiten is a goddess of, among other things, eloquance, wealth, music, water, and the arts.