Carla, the screaming witch

This is one of my own creepypasta OCs. She is still a work-in-progress, so feel free to comment on her! Thx, Guys!

Basic background info:

Carla is the daughter of a wraith and a banshee (i do not have their names yet), but she was born from the womb of a human (the power of possession!).
She gets her ability to shapeshift into any human form from her father (the wraith), and her deadly scream from her mother (the banshee).
She is OBSESSED with death, and she would have killed herself a long time ago, but since neither of her undead parents had a soul, neither does she, so she cant stay dead, (cause there aint no soul to pass on).
Every time she dies, her body turns to dust and she is "resurrected" elsewhere.
She uses general manipulation and shapeshifting skills to do her killing.
She was once hunted as a supposed "witch" back in the 1600s (thats right, shes over 400 years old!)
The witch hunters watched as she burned, but were then killed later when she was "resurrected"
She almost never kills using the same strategy.
when trapped, she screams (and if things are really looking desperate, she kills herself)
Her scream can shatter windows, cause temporary deafness, and at close range, can blow out eardrums.

Weaknesses:

silver
holy magic
Best method against her is to capture her (dont kill her), and make sure she doesnt scream and doesnt kill herself.
You must outwit her to beat her.