Himouto! Umaruchan -

: In public, Umaru is a "Mary Sue" archetype—a beautiful, intelligent, and talented student admired by everyone.

: A classmate with a fierce appearance but a shy heart who accidentally discovers Umaru’s "inner" form, leading to a unique friendship. Himouto! Umaruchan

: Umaru's shy friend and neighbor who is unaware of Umaru’s home persona. : In public, Umaru is a "Mary Sue"