Natsuki Usami  

Fishing Prince, 宇佐美夏樹

Natsuki, who hails from Enoshima and possesses black hair and glasses, often appears to be irritated. Despite this, he is recognized for participating in national fishing tournaments, earning him the nickname "Fishing Prince." His sister Sakura holds a special place in his heart, causing his demeanor to shift significantly when conversing with her.