At first, he was a cocky person since he excelled in everything. But after meeting and falling in love with Moka, he started to act more manly and later on more mature.
During his beginner years, he was able to counter and do a "head-slip" (impressive moves) without any particular training. Because of his talent, the Boss started to train him more. He later on becomes very strong.
In the 6th grade, he asked Moka out. His decision was based on academic achievement and looks compatability. He truly starts to love her when he saves her. There has been no development as he is now focused on fulfilling Moka's dream after her incident in the kid's championship.
- He began doing boxing as a way to get closer to Moka Kaname.