Even before becoming part of Team Mo, Musei had the goal of becoming a legendary shinobi, allowing his clan one day would be recognized as one of Tobikakurenai's noble clans. During his time at the Academy, Musei refused to serve as a mockery by his colleagues who said that both he and the users of spiders were strange and weird. Still, Musei made ​​few friendships he truly considered relevant. Because they are the Academy's most rejected (disregarding Sokai because he really did not give a damn about that), Musei eventually becoming best friends with Jitetsu who due to the need of his ninjutsu of eat iron-rich foods, he ended becoming more chubby than he should and so was also ignored and mocked by other children.