Mikan Yuuki

As Rito’s incredibly mature and independent eleven-year-old sister, this resourceful young girl manages the household while her parents are traveling for work. Though she frequently teases her brother and lacks traditional respect for him, she deeply cares for him and misses their childhood bond. Highly perceptive and skilled at reading emotions, she often mocks Rito's "playboy" reputation. She also shares a special, close bond with Golden Darkness, finding a kindred spirit in her.