While he lacks size, stamina and strength, he is extremely adaptable and receptive to Tsuji's orders, especially when he was the first person who witnessed his knowledge when he quickly defeated every member of Oodachi High using simple dodges except Hinomaru. and weakness (Tsuji's asthma flaring up after beating Hinomaru).
Due to his adaptability, he was able to quickly abandon his head-on style, opting for more deceptive and defensive moveset without overexerting himself physically. Also, he is surprisingly good at playing the hustler. Because the crowd expects him to lose, he plays to the role, reverts to the head-on style until the finals, or when the team is losing to surprise everyone. He tried the move against Mamiya Keiichi, where he leaps into his blind spot, and tries to push him out of bounds from behind while feinting a Russian leg sweep, but Keiichi manages to recover as the captain warned him of the plan.
He has played the flute since he was 6 years old.
- Kei Mitsuhashi vs Mamiya Keiichi
- Kei Mitsuhashi vs Ushio Hinomaru
- His blood type is A.
- He is voiced by Murase Ayumu
- Aside from playing the flute, he likes reading novels.