Umaru doma

the main protagonist of the Himouto! Umaru-chan series. She has an unknown ability to switch between two modes: an "outdoor" and "indoor" mode, the latter dubbing her as a "himouto" by her older brother, Taihei Doma.

In the anime "Himouto! Umaru-chan," Umaru Doma presents a "perfect teenage girl" persona when outdoors, characterized by her outstanding grades, charm, kindness, and humility, earning the admiration of her classmates and faculty. Academic Excellence: She is a top student, excelling in everything she does. She possesses an overall charismatic feel and is known for her kindness. Despite her popularity, she remains humble, which further enhances her appeal. She projects a sweet and cute personality. Her voice is calm, more feminine, and very refined. Kirri is a character in the show who has a crush on Umaru.

Umaru Doma's "indoor" or "hamster" form, a chibi-like depiction of a toddler, represents her childish, lazy, and messy side, contrasting with her outwardly perfect and energetic persona. This form embodies her lazy, messy, and childish tendencies, which are often in stark contrast to her outwardly perfect and capable demeanor when outside the house. Her voice and behavior also become childish and lazy when in her "indoor" form. She is very messy,and lazy, eats junk food, drinks very large amounts of cola, and is obsessed with stuffed cat dolls, playing video games, reading manga, and watching anime, she usually refers to herself in the third person, She is also prone to whining/crying when things don't go her way.

In her "indoor" mode, Umaru is drawn as a small, chibi-like character, wearing an orange hamster hoodie, a white long-sleeve t-shirt, and berry-pink knee-length leggings.

possesses the ability to switch between an "outdoor" and "indoor" mode, the latter often referred to as her "himouto" (little sister) form. In her chibi form, she has a tendency to roll around and exhibits a strong imagination.