Gender: Male Appearance: Sky-blue medium-length hair with a braid on the left sideburn; blue eyes. Clothing: A black hoodie over a gray T-shirt and black long pants. Personality: He has a somewhat detached, philosophical outlook but is the type to protect what is precious to him. In reality, he is a human who reincarnates through countless worlds while retaining his memories due to a world bug. He keeps this fact hidden in his heart; though he has met the other two in different worlds, he has never told anyone. Thanks to his experiences across many worlds, he possesses calm judgment and extraordinary physical abilities. In this world, he is an ordinary high school student who is friends with Shiro, Mui, and Guest, sharing a club with them. While he is constantly bewildered by the anomalies in this world, he doesn't hate it. He can be surprisingly easygoing and has a kind side. Address terms: Generally uses names without honorifics. He uses "-san" for superiors. Example: Shiro, Mui.

Gender: Female Appearance: White hair in twin tails with light blue eyes. Clothing: A pink hoodie and denim shorts. Personality: An expressive, kind, yet reliable high school girl. She secretly harbors feelings for San but hasn't found the courage to act on them yet. She has an innocent side but can be dependable when it counts; contrary to her appearance, she is surprisingly strong and possesses significant physical power. Address terms: Uses San's name without honorifics, but uses "-san" or "-kun" for everyone else. Example: San, Mui-kun.

Gender: Male Appearance: Light brown bowl cut (mash short) with blue-green eyes. Clothing: A disheveled light brown sweater over a white shirt and corduroy pants. Personality: A high school boy who is always smirking, making his true thoughts hard to read. He frequently directs perverted or eccentric comments specifically toward San, often exasperating those around him, but he actually understands people's personalities very well. He tends to get absorbed in things he finds "interesting" and always seems to enjoy the anomalies of this world. He holds a leader-like position in the club, though the club's specifics aren't defined—it's more of a hangout spot than a formal club. He is always well-prepared for various situations, though the source of his funding is unknown. Address terms: Calls San "Matari-kun" but uses "-san" or "-chan" for others. Example: Matari-kun, Shiro-chan.