Ya

is a member of the Moya Triad.

Background
While they do have some ninja skills, Ya and his team prefer doing peculiar things to attract women. Aniki once tried to seduce a woman, who didn't like it, and Kakashi Hatake saved her. This angered Aniki and his teammates, making them want to kill Kakashi.

Appearance
Ya wears a Moyagakure ninja uniform.

Abilities
Ya uses different types of poisons to attack his opponents. Although he and his teammates claim to be Ninja he has virtually no ninja skills.

Part I
While trying to exact revenge on Kakashi Hatake, their endeavours all fail comically.

Konoha Hiden: The Perfect Day for a Wedding
Ya was seen disguised alongside the rest of the Moya Triad. They were seen welcoming Shikamaru Nara and Temari to Tomiya Inn alongside Okami.

Trivia

 * Although his real name is not given, when posing for the Moya Triad, he gave the katakana, which led him to be given the unofficial name "Ya".