Pomni is a stylized humanoid character, with a large head and small, slim limbs. She has completely white skin, with small markings imitating blush underneath her eyes, and black eyelids and thick lines around her eyes that may represent eyeliner. Her pupil formation appears to change frequently. It is most often appears as a red and blue pinwheel imprint, but when she feels heightened anxiety or fear, her pupils are replaced with animated scribbles. She has asymmetrical eyelashes, with her left eye having eyelashes on the top eyelid and her right eye having eyelashes on the bottom. She has short, straight medium black hair (which often appears brown due to lighting)[5], with two small nuggets poking out from under her hat and two locks of hair formulating the flanks of her body.

Her ensemble resembles that of a jester, rather than that of a circus clown like Kaufmo. She wears a red and blue jumpsuit with round, poofy sleeves, and shorts. The torso part of the jumpsuit features dual colors in a mirrored/reverse design for the front and back, with blue (right) and red (left), and vice versa respectively, with her sleeves and shorts being striped. She has additional yellow accents: a pair of spheres on her front torso (which could resemble pom-poms or buttons), cuffs/rings around her sleeves, upper thighs/hips, and shorts, and a shirt collar, implying an undershirt. On her head, she wears a matching striped, two-armed jester's hat, with a yellow brim and small, yellow bells on the tips of the hat's elbows, which all of us never see separated from her head. She also wears gloves, with the left one being blue, and the right being red. Inverse to this, her left shoe is red, and her right shoe is blue—both pairs having the same yellow accents as the ones on her clothing. Personality

Initially, Pomni has a high-strung, shy, and tense demeanor. In the pilot episode, she is shown to be extremely anxious and troubled regarding her predicament, even succumbing to denial and exhibiting signs