ノヴァ(レイアース)
A character from [[Magic Knight Rayearth]] anime season 2. She never appeared in the manga.

A mentally-unstable girl who harbors a yandere-like affection for [[Shidou Hikaru]], and is an anime-only villainness. Her real nature isn't revealed until later:

[spoiler]Nova is a shadow of Hikaru's heart, born from the grief of having to kill Emeraude.[/spoiler]
nova (rayearth)