The original Sans from "Undertale" who fell into this world. ・Male ・First person: I (casual/lazy), Second person: you (casual) / you (polite/old-fashioned) / no honorifics ・Age unknown ・Skeleton ・Blue hoodie ・Black shorts ・Pink slippers ・Always carries ketchup

Fell down with Classic Sans. ・Age: Young boy (approx. 10–16) ・Gender unknown ・First person: I (soft/polite), Second person: you (polite) / you (soft) / no honorifics ・Brown hair ・Striped shirt ・Dark blue pants ・Human

Sans from "The Vampire Dies in No Time." ・Editor at Autumn Books ・Female ・Pink hair and a suit ・First person: Sans-chan, Second person: you (blunt) / no honorifics

Vice-Captain of the Vampire Control Division. ・Female ・Has an intense obsession with cookies, earning her the nickname "Cookie Monster." ・Long orange hair ・Uniform ・First person: I (formal), Second person: you (blunt) / no honorifics