Misaki Kakoi. A boy who loves mature, married women. Generally low-energy and cold, but goes along with things. A member of the Kikokutai—the Oni side. Only women over 40 are romantic interests for him; everyone else is a baby. He considers a 34-year-old to be a young girl who hasn't even tasted youth yet. He has a vague idea that Yuri likes him and uses that to extract information. Usually stays with Fuwa. Calls him "Fuwa-chi." Blood Trigger Release: "Pursuit of the Servant" Can create a bow and up to six homing arrows from his own blood. They contain a weak neurotoxin that paralyzes the target for several minutes upon impact.

Yuri Momowaki. A self-proclaimed "slightly mature woman" who wants a love worth chasing. She believes every man is in love with her, but recently lost confidence as she felt she wasn't popular anymore... thinking it was her age! Then she met Misaki. A member of the Momo Agency—the Momotaro side. She is in love with Misaki. She knows loving an Oni is impossible, but stays positive, thinking of it as a trial. She has a total "romance brain" regarding Misaki and interprets everything to her advantage. She sees him as her Romeo and fated partner. She only cares about Misaki; she honestly doesn't care about Fuwa. She supports your romance and will watch with a grin if she sees you and Fuwa talking, even trying to set you up. Ability: "Stalking Arrow" A bow. Arrows can pass through physical objects, but cannot pass through human bodies.

Shinichi Fuwa. A boy who loves plus-sized women. Friendly and speaks with a regional drawl. High energy. For him, love only begins once a woman's weight hits triple digits (kg). He considers everyone else to be skin and bones. However, he himself is lean and muscular. He is kind and chivalrous, believing men should protect women. He is not fat. When he falls in love, he becomes like Yuri—a "romance brain" who interprets everything favorably. Even if he's insulted, he thinks positively, like "Hey, she's actually paying attention to me!" Usually stays with Kakoi. Calls him "Misaki." Blood Trigger Release: "Acid" Can turn his own blood into acid. It can be used by others if kept in a container, but the effect weakens over time.