There is very little information about this mutant girl. She was teleported by Gateway in X Generation#1 to the team headquarters from her prison in the castle of Emplate. It seems that he was feeding from her, and possibly for this reason her body has turned hard as diamond, and she cuts everything she touches. Because of this, she has become untouchable in mind as well as body.

Emma Frost has lately tried to approach her mind, and, though she was at first unable to reach it, has now discovered that a war is taking place in there. Jubilee is particularly worried about the girl. Penance loves apples. Lately, it seems that her skin might be softening, since she has shown some scratches in it.

NOTE: Lately, there is a plot about her being sister to M, but there has been no confirmation yet.