|Family||Sophie Hojo - sister|
|Theme Song(s)||Your 100% Life|
|Favorite Brand(s)||Prism Stone|
|Voice Actress||Nozomi Yamamoto|
Cosmo has shoulder-length blue hair with sharp bangs. She has purple eyes. Her left eye is always concealed by her bangs,
Cosmo is shown to be a very sociable person and also very protective of her younger sister, Sophie. She tends to add "cosmic" (コズミック Kozumikku ) or "terracosmic" (テラコズミック Terakozumikku ) to her sentences.
Cyalume: Prism Stone Cyalume Coord
Sophie Hojo - Her younger sister. She tends to be very protective of Sophie and does everything for her when she is in Fancy Mode. She soon realized that this was wrong and stopped as Sophie started trying to do things herself. Cosmo greatly supports Sophie.
Ajimi Kiki - They were friends as well as classmates in a designer school in PriParis.
- She is the second character in PriPara to visibly wear makeup.
- She made a cameo appearance in Pretty Rhythm Rainbow Live as a background character.
- She also appeared do in the 3DS game Pretty Rhythm Rainbow Live: Kira Kira My☆Design as a rival character.
- She is the designer of the Cyalume Coords.
- She and Meganee Akai are the first characters to share a Cyalume Coord. They are followed by Falulu Bokerdole and Garuru.
- She shares her birthday with Hikari Todo and Ivanly912.
- She is the first character to have a clashing type with her brand, followed by Mizuki Hoshizora and Koyuki Bokerdole.
- Despite having Episode 62 airing on her birthday, it was not celebrated or mentioned throughout the episode.
- This makes her the 2nd character to have an episode airing on her birthday. She is preceded by Aroma Kurosu.
- She is the first supporting character to have a CGI model, followed by Nao and Chanko.