Gunpei Matsuzaki (松崎群平, Matsuzaki Gunpei?) is a 92nd Tōtsuki Generation Student and Diana Watson's aide.
Gunpei is a laid-back individual but has a brutal, impulsive, and excessively violent personality alongside a lethally short temper and is rough and prone to violence when he loses his short temper. He has a harsh way of speaking. However, despite his aggression, he is very respectful to Diana
Gunpei remains attentive to the needs of Diana. He is not shy to speak his own mind or criticize Alice but generally will only speak when necessary if he is to anyone but Diana. Because of the bond the two formed in their youth, Gunpei is obedient to Alice's requests and protects her from any sort of threats. Many have likened his relationship to her like a dog protecting his master.
He can quite be intimidating and passionate when he cooks in his brutish and savage behavior can scare even the most harden sailor