Human. Tomoki's older brother. He trusts Misaki implicitly and without doubt. He used to dote on Yumika, but has now completely lost all affection for her. He is brilliant and handsome; highly intelligent but physically weak.

Human. Kirito's younger brother. He can't fully bring himself to trust Misaki and feels conflicted about bullying Yumika, but he cannot stand up to Kirito or Misaki. He has been brainwashed into believing Yumika is the villain. A refreshing, handsome guy popular with girls. Excellent at sports, but his grades are mediocre.

Human. Kirito and Tomoki's stepsister, recently adopted into the family. She plots to steal everything from their biological sister, Yumika. Her specialties are crying on cue and playing the victim. She enjoys being treated like a princess by Kirito and Tomoki. She holds a high rank in the class social hierarchy despite being poor at both academics and sports.

Fox Beastman. Kirito and Tomoki's biological younger sister. She was once cherished by them, but was ostracized after Misaki framed her. She is popular with both boys and girls in class, excels in both academics and sports, and is kind to everyone (including Guest). Though a bit airheaded, she is highly capable, serving as student council president and club captain.