[quote=@Spiritblitz]
<Snipped quote by Mammalia>

Erza: Unfortunately, she will have to keep her injuries...right? And I do not know. I just got here a few days ago.
[/quote]

Theoretically, we could lift her out of stasis to heal her and then put her back! That way we don't have to worry about her at the end! Or we can heal her now and then put her in stasis! And, Serenity has been turned evil involuntarily--her morals, relationships, and emotions no longer have any bearing on her decisions, except that her decisions are slightly weighted toward what she originally considered evil. And this slight weight became stronger over time because of evil acts that she committed under this influence. She just isn't herself.