So How Parasite last died was she was fighting a corrupt Faith, he killed Trauma which was part of her soul, more of close to half. This caused her soul to become highly unstable though she never really died. She was stuck in Limbo, half dead, lonely and full of anger. She had lost her darker half, her back up, her friend, her support. She was lost at first, what could she do? She lost the only thing that gave her the ability to kill or harm others. But without a life to live in Limbo since she had no happiness to live there, she knew no happiness in life so she could not recreate it in Limbo. She went nuts in the empty blankness of Limbo, slowly her outfit ended up showing how she ended up becoming what she had lost. She built herself up to be the darkness she needed to keep herself, well, herself. She left Limbo now with her soul stable and with a whole new level of wraith to rain upon all those who wronged her, her friends, her son or any other corrupt being to exist.