Akayuki Ike

Koyuki  is one of the female protagonists in the story, she is Kazuki Ike's little sister.

Personality
Koyuki has the opposite personality of Kazuki, Akayuki is bright, social and talkative, making her the positive counterpart to her brother.

Appearance
Koyuki  has a long black ponytail, with a stray piece of hair sticking out of the top of her head, she resembles her brother- both having black hair and blue eyes.