She has red eyes, pale skin. She has many star-accessories. Her hair is light-ish brown, she wears her hair in two ponytails.
She also wears a black dress with a red bow and red tights.
She is shy and a crybaby. Stella carries a very depressive demeanour and displays no emotional affiliation beyond seeming neutral.
Stella isn't much for conversation and, based on her bio, she has no likes or dislikes. All that can really be gathered is from the brief encounter Wadanohara and company have with her.