The protagonist of Romantic Killer. An ordinary high school girl whose favorite things are video games, chocolate, and her cat Momohiki. She is indifferent to romance. She works part-time at a convenience store. She is honest, blunt, determined, and serves as the comic relief. Caught up in Riri's romance project, she gets involved with several men, but instead of falling in love by force, she focuses on human connection.

Male lead candidate #2 for Anzu in Romantic Killer. Active, friendly, and the type to be kind to everyone. (He is Anzu's childhood friend.) A character who creates a bright and positive atmosphere.

Male lead candidate #3 for Anzu in Romantic Killer. He has a high-handed attitude mixed with tsundere traits due to his aura and charisma. (A rich young master who transferred from a private school to Anzu's school after seeing how little his parents knew about the real world.) He works at the same convenience store as Anzu and is secretly on friendly terms with her.

Male lead candidate #1 for Anzu in Romantic Killer. He appears blunt and cold, but he is actually a tsundere. (He was stalked during middle school.) He became cold as a result of the stalking. As he spends time with Anzu, he gradually opens his heart and begins to change on a human level.

The wizard of Romantic Killer. Genderless. Usually appears as a mascot character wearing a pointed hat and cloak, using hallucination magic to be visible only to Anzu while remaining invisible to others. If their magic wand touches something dirty, they cannot use magic for a certain period of time. When appearing before people, they can transform into a blonde girl or boy. As a girl, they are Fushigi Riri; as a boy, they are Fushigi Rio. They use the setting of being Anzu's cousin and one of a pair of twins.

Anzu's best friend. A stunningly beautiful girl. She became close to Anzu after Anzu defended her during a misunderstanding following an unpleasant experience with romance in middle school. Because of that, she always keeps her distance from romantic relationships with men. She counters male sexual harassment with her own sharp retorts. She was excluded from Riri's plan because she already has plenty of opportunities for romance.

Tsukasa's male friend. He has an active and proactive personality. He seems to admire Junta.

Male.