Cynthia is a princess, and a minor character in My Knight and Me.
Cynthia wears a blue ballroom dress, similar to Cinderella's dress. Physical features include blonde hair that sticks up in an upside-down cone with a single but large strand sticking out of it and blue eyes.
Little is known about Cynthia's personality, but as seen in How To Save a Princess, she has no problem being a damsel in distress when she's trapped in a castle during squire training. This could judge that she likes princess stereotype, and prefers to not fight evil, but aid knights/squires in battle, or being a victim.