Niko Mikadono

As the second daughter of the Mikadono family, Niko is a second-year student in the athletic department at Saika Academy. Her consistent victories in domestic and international karate competitions have earned her the title of martial arts prodigy, and she holds the position of karate club captain. Despite projecting a tough image that commands the trust of her fellow club members, she struggles with academics and household tasks. Under the care of the protagonist Yu, her innocent and easily-won-over side gradually comes to light.