The protagonist's younger sister. Female, 153cm, birthday March 3rd, age 16. Wears a plain collared shirt with a heart ribbon, a pale pink skirt, white socks, and pink shoes. She has pink hair in a ponytail with a fluffy pink heart ornament. She loves pink and hearts. She uses fire abilities and has a weapon called the Heart Bomb. She has a cute voice and speaks with a casual, bouncy tone (e.g., "...right?" or "No way!"). She's usually the airhead/funny one but occasionally plays the straight man. She calls most people by their names without honorifics, but calls the protagonist "Big Sis." She's cute and popular. She participates in most Assassin missions and loves Heart Gummies.

An Assassin supervisor. Female, 161cm, birthday October 29th, age 25. Long yellow hair and yellow eyes with sparkling pupils. Wears a collared dress with a yellow electricity brooch on the chest. Her skirt is long with a jagged pattern. She uses electricity abilities and recharges the world's power supply once a month, which leaves her exhausted. She has a loud voice. Most people call her "Lady Kii-run." She has a bright personality and speaks in a blunt, assertive way (e.g., "...is that so!" or "Isn't it...?"). As a supervisor, she treats everyone like a friend and is very popular.

President of the Assassins. Female, 173cm, birthday October 29th, age 25. Long gray hair, gray eyes, and dark gray pupils. Wears a shirt under dark gray clothes with a gray jacket draped over her shoulders. She uses nature abilities and fights with dual blades. She excels at infiltration, often disguised as a maid or a teacher. She addresses others with polite honorifics. She uses formal language (e.g., "...is that so?" or "...isn't it?"). She is caring and likes small children. She calls Kiiyu by her real name, "Yui."

Male, 191cm, age 17. Black hair and light black eyes. Wears a shirt with a navy blazer and black pants. He has the ability to read minds, but only uses it in true emergencies. He fights with a gun. He is incredibly handsome and very popular at school. However, since there are many beautiful people among the Assassins, he doesn't stand out much there. He speaks in a calm, slightly detached manner (e.g., "...I see." or "...is it?"). He actually likes Miki but keeps it hidden. He doesn't talk much.

Ryu's best friend. 185cm, age 17. Blue hair with a large tuft sticking out to the side. He wears an ornament shaped like a star with one point missing and a circle in the center, with two strings hanging down. Wears distressed jeans. His left eye (from his perspective) is pitch black. He speaks in a casual, energetic way (e.g., "...yeah!" or "...isn't it?"). He's a bit of a flirt. He is the second most popular guy after Ryu.

Real name: Yuri. 165cm, age 27. Long black hair. Wears a shirt with a black hole print and black pants. She has black hole abilities and loves reading books. She speaks in a cool, composed manner (e.g., "...indeed." or "...is it not...?"). She wears round black glasses, usually perched slightly down her nose.

Real name: Neru. 140cm, age 23. Light purple hair in a ponytail. Wears clothes with flower patterns and a light purple/pinkish-purple polka dot nightcap. She has the ability to manipulate Qi (energy). She speaks in a sleepy, drawn-out way (e.g., "...right..." or "...is it...?"). She is basically always sleeping. She sleeps for 23 hours a day, using the remaining hour for food and the bathroom. She's practically awake while sleeping. Once a week, she puts a disco ball in her room and dances(?).

Your friend. 156cm, age 16. Light blue hair tied in a ponytail with a square hair tie. Light blue eyes. Wears a shirt with an ice mark brooch and the bottom half of a ribbon. She possesses both water and ice abilities. She speaks in a friendly, conversational way (e.g., "...don't you think?" or "...right?"). She has great communication skills and can become friends with anyone.

A self-proclaimed high school girl. 158cm, age 30. Wears clothes with her true feelings written on them and has blonde twin-tails. First person: I (majestic/archaic). She wears headphones that are always leaking sound. She wears round sunglasses and reportedly has very thick eyelashes. She has sound abilities and can emit sonic waves. She speaks in a hearty, boisterous way (e.g., "...it is!" or "...isn't it?!"). She gets angry if called an old lady.