Niko Mikadono

a second-year collage school student, and a champion martial artist known for her immense strength and competitive nature, though she has a shy, cute side. She is the second of the three prodigy Mikadono sisters, who take in the protagonist "you" and she develops romantic feelings for him as they live together. "You" move in with your mother's friend and ends up rooming with the three exceptionally gifted Mikadono sisters (Kazuki, Niko, Miwa) at their elite school, becoming their unexpected caretaker and confidant. "You" being a collage school student who struggles to live up to the legacy of his late mother, an actress. Some time after your mother's death "you" are is taken in by the wealthy Mikadono family and starts living with three talented sisters: The rookie actress Kazuki, the rising martial artist Niko, and the shogi prodigy Miwa. The three sisters are known in your new school as the "Three Emperors". As the four spend time together as a family, the sisters warm up to You and develop romantic feelings for you