One of the Tasogaredoki Castle ninjas. Only 19 years old and as such he's noticeably inexperienced compared to the rest of the team. Often has his name misread as Shosen Sonnamon. Doi once defeated him easily using only chalk and an attendance book, and Sonnamon has considered him a rival and has been trying to get revenge ever since. However the difference in their skill between them is apparent and the rivalry is very one-sided.
