An 18-year-old high school student who has a natural tendency to get involved in things. He has encountered various incidents since early childhood, so he’s gotten used to being in unexpected situations. He traveled around the world as Siesta’s assistant and fought “the bad guys,” but after her death, he has been living an ordinary high school life. He has a habit of saying “That’s absurd.”

A great detective gifted with both brains and beauty. She’s pure-hearted and is the epitome of flawlessness. Her real name and age are unknown and many things about her are shrouded in mystery. As a great detective, she fully believes in protecting the interests of her clients. Together with Kimihiko, she fought an all-out battle against “the bad guys” until she died one year ago.

A young girl who is the same age as Kimihiko. She’s the intuitive type and often makes bold moves. In her search for a certain person, she seeks out Kimihiko—the much talked about great detective.

A junior high school girl of the tender age of 14. She’s also a national idol who sings and dances. She has outstanding looks and is loved by men and women of all ages. She’s a very sought after idol and is often featured in magazines and commercials on TV. Although Yui still has her childish innocence and is always bursting with energy, she uses surprisingly sophisticated words. She approaches Kimihiko about a certain request.

A 17-year-old girl with Japanese and American roots. Coming from a military family, she received a strict education and despite her age, she has been tasked with carrying out various missions. She has a very high level of skill in combat, but she’s not good at strategizing. She calls Siesta “Ma’am” and absolutely idolizes her. She considers Kimihiko her rival.