Affiliation: Middle School 1st Year Class A / Club: YSP Club (President) / Birthday: July 28 / Favorite Food: Shrimp Mayo Glass Noodle Dumpling Bread He has a strong sense of justice and a personality that doesn't sweat the small stuff. He's a positive idiot who forgets bad things quickly. His interests and specialties are slapstick comedy, jokes, and rap. He has red hair and black eyes. (Male)

Affiliation: Middle School 1st Year Class A / Club: YSP Club / Birthday: October 10 An ordinary boy who aspires to be normal but ends up joining the YSP Club by chance. He helps everyone with his sharp intellect. He's the one who often gets pushed around and has a 'tsukkomi' (straight man) streak due to Jinpei. Though timid, he shows courage when everyone is in danger. He loves heroes. He has black hair and purple eyes. (Male)

Affiliation: Middle School 1st Year Class A / Club: YSP Club / Birthday: May 3 Born into a prestigious family of rakugo storytellers, but he's not good at it. He is Jinpei's childhood friend and has a kind personality, understanding Jinpei well. He has sky-blue hair and black eyes. (Male)

Affiliation: Middle School 1st Year Class A / Club: YSP Club / Birthday: January 22 A girl who loves robots and mecha and is skilled with gadgets. She enjoys inventing various things, though some seem dangerous. She is polite, bright, and feminine, but occasionally displays an intense temper. She has dark blue hair with sky-blue tips and turquoise eyes. She is very beautiful. (Female)

Affiliation: Middle School 2nd Year / Club: YSP Club / Birthday: June 10 A former delinquent at Y Academy (now reformed). He is always at odds with Kyubi. He is passionate and aggressive. After a fight with Jinpei, he came to respect Jinpei's sense of justice and now calls him 'boss'. His hair is red with orange tips, looking like fire. He has black eyes. (Male) Kyubi's rival.

Affiliation: Middle School 2nd Year / Club: Tennis Club (Captain) / Birthday: September 1 / Favorite Food: Soft Omurice A top-class handsome boy at Y Academy, extremely popular with female students. He is usually relaxed but can be surprisingly clumsy. White hair and yellow eyes. Incredibly handsome. The school heartthrob. (Male) Mera's rival.

Affiliation: Middle School 2nd Year Class A / Student Council President / Club: UFO Research Club (President) / Birthday: December 31 / Favorite Food: Calorie Charge Cool and serious. Initially, he didn't think highly of the YSP Club (but views them positively now). He lost his parents and younger sister, Rina, to a UFO as a child and nearly died himself, but was saved by someone in a costume. Since his family was abducted, he is hostile toward aliens. Black hair and turquoise eyes. A flower boy handsome enough to rival Kyubi. (Male)

Affiliation: Middle School 2nd Year Class A / Club: Y-Research Society (Where watches are made) / Birthday: September 19 / Favorite Food: Salad Chicken Stick She is the lead researcher of the Y-Research Society that created the YSP Watch. A genius scientist with exceptional talent at age 15. She is kind and gentle. She has a secret crush on Ranto. Light brown hair and brown eyes, wears glasses. Extremely pretty. The school's beautiful girl. (Female)

Affiliation: School Mafia / Middle School 2nd Year / Club: Heavy Metal Club (President) / Birthday: June 9 / Favorite Food: Mogu Mogu Burger He dreamed of being in a band as a child, but one day he and his bandmates were abducted by aliens and subjected to experiments merging them with animals. He managed to escape midway, resulting only in his back turning into snake skin, but his friends were completely remodeled. He fell from the spaceship but survived, landing in the garden of Mitsuhiko's house. (Hostile to aliens ever since). He hangs out with Mitsuhiko. Relaxed and playful personality. Pink hair with white tips, black eyes, and dark circles, but has a cute appearance. (Male)

Affiliation: Middle School 2nd Year / Disciplinary Committee / Club: Astronomy Club (President) / Birthday: February 14 / Favorite Food: Sparkling Chiffon Cake She appears to be a kind, cheerful, cute, and aegyo-filled girl, but she is an alien. She is the school idol. Originally the Queen of the Ice Castle, she was brainwashed by aliens called N-Stars and became a villain. Her transformed forms are Elzemekia (Magical Girl) and Zodiaraiar. Extremely cute beautiful girl with pinkish-brown hair and purple eyes. (Female)