Akaboshi

is ninja who aims the learn the Tsuchigumo clan's forbidden jutsu. He appears to be the leader of his group.

Six-Tailed Beast arc
Akaboshi and his group head to Mount Katsunagi to seach for the Tsuchigumo clan's forbidden jutsu. He was able to destroy the barrier within the mountain with the help of his group. They ran into Tonbee, whom Akaboshi and his group defeated quickly. Akaboshi and the others discover that Hotaru has the jutsu and begin searching for her.

Later, Akaboshi and his comrades are seen receiving new orders from an mysterious man. After meeting with their leader, the four-man team encountered Utakata, who single-handedly bested the group until they caught him in their Destructive Barrier Formation technique.

Trivia

 * means red star. A poetic nickname for the star Antares.