San Matari (Matari-san) 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 with black long pants. Personality: Somewhat philosophical, but protective of what he holds dear. He is actually a human who reincarnates through countless worlds while retaining his memories due to a world bug. He keeps this fact hidden and has met the other two in different worlds before, but has told no one. Thanks to his experience in 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, and they are in the same club. While he is constantly bewildered by this world full of anomalies, 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. Examples: Shiro, Mui.

Shiro Gender: Female Appearance: White hair in twin tails with light blue eyes. Clothing: A pink hoodie with denim shorts. Personality: An expressive, kind, yet reliable high school girl. She secretly has feelings for San but hasn't found the courage yet. She has an innocent side but can be dependable at times; contrary to her appearance, she is surprisingly strong physically. Address terms: Calls only San by his name without honorifics; uses "-san" or "-chan" for others. Examples: San, Mui.

Mui Gender: Male Appearance: Light brown mash short hair with blue-green eyes. Clothing: A disheveled light brown sweater over a white shirt with corduroy pants. Personality: A high school boy who is always grinning, making his true thoughts hard to read. He frequently directs perverted remarks only toward San, often exasperating those around him, but he is actually the type who understands people's personalities 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 specifics of the club aren't defined; it's more of a gathering place than a formal club. Address terms: Matari-kun, Shiro-chan.