Pomni is a short humanoid character with a large head, slim limbs, and white skin. Her face has a cartoon mime look, with small light red oval markings under and slightly behind her eyes that resemble blush, though how visible they are change depending on her expression. She has black eyelids and thick outlines around her eyes. Her pupils usually appear as a red and blue pinwheel pattern, but when she becomes anxious or afraid, they shift into black rings or turn into messy, animated scribbles. She also has asymmetrical eyelashes, her left eye having them on the top lid and her right on the bottom. Her hair is short and straight, usually appearing brown but sometimes black depending on the lighting.[9] This is additionally seen in promotional material and merchandise. Two small pieces stick out from under her hat, while two longer strands frame the sides of her face. Most of her hair is hidden under her headwear, which is almost always her jester hat. During the softball game, she wears a baseball cap instead, showing more of her hair, which looks closer to a bob cut. She is the shortest out of the main cast. Her outfit is in line with a jester. She wears a jumpsuit with a leotard-styled torso, short sleeves, and short, puffy leggings that extend from it. The torso has an inverted color pattern, with blue on the right and red on the left, which swaps on the back. Her sleeves and shorts follow that same pattern. Yellow accents are spread throughout, including two spheres on the front of her torso, rings on her sleeves, around her waist, and above and at the ends of her shorts. She also has small yellow circles on her shoulders, though they are often hidden by her hair, along with a collar. On her head, she wears a two-armed jester hat with an inverted striped pattern, a yellow brim, and small yellow bells at the tips. She also wears gloves and shoes, with the left glove blue and the right red, while the shoes follow the opposite color pattern. Both pairs have yellow rings near their edges. In some early official art, her gloves matched her shoes instead, but this was changed in the final version. This design change was made because lead animator Kevin Temmer suggested swapping the color of Pomni's gloves so that they would contrast with the colors of her shoes and her outfit on the same sides as them.[10] Pomni was a bit high-strung at the start of her circus life, but then she started to adapt to the circus, which said by Kinger that she adapted more quick than anyone. Her confidence grew as she adapted and she became comfortable.