Luna is in the main antagonist of the manga Gakuen Alice so far. Though she look as if 11, she is 29 years old. She has the 'Soul Sucking' Alice, which is an alice that can threaten her life. It can be used in two ways: 1. Remove part of the soul to control someone (results in mark on victims' neck); or, 2. Remove all of the soul to kill someone This is why she can be classified as either in the Somatic Ability or Dangerous Ability class. She is paired with Natsume as his partner, and Natsume sticks with her to protect Mikan. In reality, they hate each other. Luna's main target is Mikan.
It's later found out that her and Mikan's mom used to be best friends.