Rin is the self-proclaimed prince ("Not princess!") of a kingdom in another world. Though she tries to maintain a "proper" demeanor befitting her royal heritage, her true, unfathomable personality always shines through.

Rin owns a sword named Clarent, which she claims was given to her as an important responsibility.

Rin's mother is Gin Penrose, The Queen and mighty leader of the nation. Gin Penrose is very powerful with her ice magic and saber, Gin can overpower Rin easily.