Kohaku is a kind young woman, caring deeply for her older sister Ruri. This care extends to her comrades, and anyone she's loyal to. Other than her sister, she is particularly dedicated to Suika, playing for her the role of an older sister herself. While she cares so deeply for her friends and family that she would be willing to sacrifice herself for them, she is extremely cautious or even threatening with people she doesn't trust. Kohaku excels at fighting, hunting, and general survival skills.