Kenichi Mitsuba

A 10-year-old boy who goes to middle school and is poor in his studies. He likes Yumeko, however also Kemumaki is always after her. He also tricks Hattori to help him in any situation, even in extreme ones (e.g. in one episode, he wanted training to become a full-fledged ninja). He also does not follow his mother's instructions properly and often gets a severe scolding from his mother. Though he doesn't study well, he has a good habit of helping others. He is always the victim of Kemumaki's mischievous plans.

(Source: Wikipedia)