Cyan is a white female myuumon with black cat ears and tail and yellow eyes with navy blue pupils. Her outfit consists of a navy and white ruffled lolita dress and a white maid hat on her curly dark blue hair. A large pink bow and silver bell hang around her neck which eventually becomes gold upon evolving. She striped stockings with platform baby doll shoes. In her humanoid form her eyes are emerald green.
In the anime, before getting sucked into the game, she was a normal human who wore red rimmed glasses with her school uniform and had straight hair that ended at her shoulders.
She has been seen a childish sometimes but is very dedicated to music.
From the anime, Cyan is shy. Shown when she couldn't get the courage to apply for the music band she wanted to join. She joins Plasmagica after getting sucked into Sound World, and expresses immediate excitement about becoming a musician. She becomes fast friends with ChuChu, Moa, and Retoree, the latter of whom develops a crush on her. She soon finds out that she has been chosen to save Sound World, and cannot leave until she does. Cyan accepts this duty with enthusiasm after some confusion.
- Like typical cat girls, she ends her sentences with Nya. She started doing this involuntarily.
- Her ears would move according to her mood.
- She is the titular character of the game.
- The name of her guitar Strawberry Heart.
- Loves strawberries.
- Her birthday is on May 24.
- She is shown playing Show By Rock (game) on episode 1.
- Cyan is the only female character to have her sclera changed in her Myumon form.