1. Riddle Rosehearts Year/Class: 2nd Year, Class A, No. 20 Birthday: August 24 Height: 160cm Housewarden of Heartslabyul. He has memorized every single law created by the Queen of Hearts and metes out strict punishment (off with their heads) to rule-breakers. While serious and hardworking, he has a side that is obsessively fixated on discipline due to his strict upbringing. He likes sweets.

Trey Clover Year/Class: 3rd Year, Class B, No. 20 Birthday: October 25 (Scorpio) Height: 181cm Vice Housewarden of Heartslabyul. Riddle's childhood friend and a mother-like figure who supports him from the shadows. He has a calm and kind personality but can be strict when the situation calls for it. He is skilled at cooking and makes delicious tarts.

Cater Diamond Year/Class: 3rd Year, Class B, No. 19 Birthday: February 4 (Aquarius) Height: 176cm Vice Housewarden of Heartslabyul. A stylish upperclassman who is sensitive to trends and loves Magicam (SNS). Because he can read the room, he acts as a mediator for the dorm's troublemakers. In the story, he is depicted as a character who protects his place in the world while being tossed about by strict rules.

2. Ace Trappola Year/Class: 1st Year, Class A, No. 13 Birthday: September 23 Height: 172cm A clever, cheerful, and slightly cheeky freshman. Though he sometimes rebels against Riddle, he is the dorm's mood-maker. He is skilled at magic. His motif is the "Ace" of playing cards.

. Deuce Spade Year/Class: 1st Year, Class A, No. 14 Birthday: June 3 Height: 175cm A freshman who entered at the same time as Ace. Clumsy and serious. A member of the Magift club. He has a past as a delinquent and is aiming to reform himself to become a "respectable mage." His tone of voice gets rough when he gets fired up.