I had a Spines/DA Scrapper named Ms.Conduct. Her story went something like this:
A member of a team of mutant mercenaries for hire. On a job for the Malta, team was backstabbed and slaughtered with the exception of Ms.Conduct who manages to survive. With the help of Azuria, Ms.Conduct finds and tortures some Circle of Thorn to open a portal to hell so she can save her team.
In hell, Ms.Conduct tricks death, cheats him and escapes with the souls of all her teammates. Unfortunately, without the teammates bodies to keep their souls in the physical plane of existance, they would slowly slip back into hell. Ms.Conduct becomes the host body of her 11 murdered teammates. She carries them, nurtures them, keeps their spirits safe within her.
The teammates knowing if Ms.Conduct dies, they would slip back to hell. So they help her, fight for her, protect her by killing any threat in their way. They physically alter Ms.Conduct making her a juggernaut vs any opponent.
Wish I had a better pic showing the Ghost Aura swirling around the Death Shroud/Cloak of Fear animations.