Ohhh claim!!!
I have a few ideas :)
Idea one ) Cyabella could potentially be a spirit who has to ability to posses technology. She could communicate with her victims through a computer, try and get them to lower their guard, maybe pass her self off as just another person looking for romance, and once she gets them to agree to meet in person, she reveals her true self and feeds off their life source. Maybe she does it this way cause she is confined to one area and needs to bring her pray to her
Idea 2) maybe Cyabella is a spirit that is haunting a man's house, and ultimately failing to kill him, but wanting to ever so much. This guy just has like crazy good luck, and unknowingly just always manages to avoid her attacks till it slowly drives her crazy
Idea 3) Maybe Cyabella is a Demon esk creature who is carnivourus and feeds off what ever she gets her hands on, but she falls in love with someone and has to resist her urges to just, devour him or her
Idea 4) Maybeeeeee Cyabella is a spirit that was trapped away for being considered too dangerous to be roaming free, maybe her just utter need for chaos was too much, too devious, so she spends her days feeling like she is in a cell, with nothing but white walls surrounding her. She could be slowly growing madder and madder, till one day she is accidentally set free and she sets out to get revenge on all who caused her to be locked away for so long
5) less evil ideaaaa
Maybe Cyabella is a demon or spirit girl who looks terrifying on the outside but really just wants to be accepted. She wants to fit in and be loved by those around her, but is instead met with fear, and cruelness
Hope some of that helps ^^
I can't post in character for im on mobile but I'd loveee help with her !!
http://toyhou.se/1252358.-
Or them :) http://toyhou.se/520217.kaylee-and-kourtney-lyle