Tsutsuji Tōnosawa serves as an attendant at a hot spring establishment while also being a second-grade junior high school student. She possesses distinctive pink hair and ochre eyes. Her personality within the hot spring is notably energetic and sporty, evidenced by actions like running at high speed and even carrying another character while dropping from the sky. Like her fellow female attendants, Tsutsuji wields supernatural abilities focused on heating bath water, though her proficiency in this skill is less advanced; she struggled to make the bath sufficiently hot, unlike another attendant who caused it to boil excessively. Her duties include assisting with the hot spring's operations, such as participating in efforts to accommodate cats in the bath facilities during the off-season.