Mikoshi

is a genin from Sunagakure. He is a team-mate of Matsuri and Yukata.

Naruto's Back: Friends' Tracks
When Konohagakure decided to host an early Chūnin Exam co-sponsored by Sunagakure, Mikoshi joined the exams with his team-mates and went to Konoha where the first exam would be held. Once entering the exams, Mikoshi and his team-mates were randomly split up and sent to different rooms to take the written test. On monitor, Shikamaru Nara, as proctor, explained that everyone only needs to answer one question on the test, but their combined score with their team-mates will determine if they pass or fail the exam as they need exactly 100 points to pass.