Slenderman--

Despite having the best rack of all the submitted characters, I'm gonna say no. 

Here's what I'd need to see to change my mind

1) You not trying to import an Assassins Creed character into a Fallout RP. 
2) WAY more fleshed out bio, with a stress on explaining how by 18 years old she has her abilities. 
3) Something more to her character than just "I kill things good". Not every problem encountered is going to be solved through slaughter. Bring something else to the table as well.