>>48322239You can kill the thing. She's not an alien, she's an ancient creature that has been on the earth since before humanity, spent most of her existence sleeping and waking every few how-many-years to devour flesh. As far as she is aware she is the only one of her kind. She's canonically not even a girl, the first creature that showed her kindness (and whose body she devoured) just happened to be a little girl and she developed a liking for it.
>>48322494It's possible but likely she's just merged with her previous bodyhaver since that's where the lore is headed, and likes big sisterly figures since the little victorian girl whose body this is died trying to protect her big sister.