In the anime and manga she loses her magical computer. Ayu returns it to Nina when she finds it. Nina told Ayu that she was from the Magic Kingdom because Nina felt that she could trust Ayu. Later on she tells Hiroki and Tetsushi. Later on in the manga Hiroki becomes her boyfriend. She strives to make Ayu happy and would do anything for her. She has a cat named Leo in the manga, in the anime his name is Rio. In the anime she is after the 5 Holy Stones so she can become princess of the Magic Kingdom.
Nina has bronze shoulder-length hair tied in two ponytails with pink bands. She is shorter than Ayu.