Assassin

Rin, is an assassin, as she was about to be killed by an angry mob, she rushed to the forest..
Only to be hit with the back of a kitchen knife, knocked out
Days later, she's awake and scared
She doesn't understand English but actions, like an animal learning about humans

But these people weren't humans at all.. She tries to run away, except Slenderman grabs her black cat tail to prevent her from escaping, and she cries, plus meowing

The Creepypastas know she's a killer, and Slenderman could tell she's a demon, from the underworld

Except, why did Jeff bring her to the Slendermansion? Why doesn't she understand? And.. Why is she here? When she's powerful already, since she's got black blood strengthening her bones and blood

She's come to find her weapon that the Creepypasta stole, and his name was Zalgo