Clearly there is something suspicious about the family history of sacrificially killed Lil Smokie, now identified as Ramona.
Her twin sister denies her existence and she's been up to no good.
She's tallied the number of deaths in the house within the blood stained floor where her death occurred and encouraged Josh to turn wolf and slaughter Mark's pack including Kenny's love interest Astrid.
A lot of fans seem to be taking this event as face value but I think there is something more going on here than pure evil.The marks on the ground/obsession with/causing deaths in the house could also be a result of psychological issues which could have been caused by a lack of affection in life. There was an SVU episode where a young woman who received less affection from her mother than her twin brother, who then felt used when caring for the same mother in old age decided to "free others' of their burdening elderly mothers by killing them, then on top of that framed the brother.
The same effect could be going on here with Ramona. The fact that she appears in a hidden portion of the newspaper photo of her twin sister Beatrice seemingly in that same room suggests that perhaps it had been her prison even alive. This is also suggested when Aidan asked her if she came from the house and she specifically corrected "This room." It could also explain why she took this long to make her presence known. That perhaps she'd grown accustomed to not being able to leave that room.
Perhaps the twin sister was also a factor, she'd either been treated with more affection by the parents or she herself always treated Ramona poorly. Ramona expressed to Sally that she wanted to see her sister and it seemed to give her joy that Sally seemed able pull it off like she misses her but perhaps she's a good little actress, that what she really wants is the sister back in that house where she can get her claws into her, revenge.
Then there's the fact that she'd been killed in a sacrificial ritual...in the 1970's not 1692, that alone is suspicious enough.
Now although it's not clear why she'd chosen these particular roomies since no doubt several people have lived in that house since the 70's but she'd apparently clung to them, considering them her friends. This became an unhealthy obsession, also the mark of a psychological issue.
Here is why I believe it to be so:
Her expression seemed frightened and desperate when she was pleading with Josh in that dangerous situation, I believe she'd even said something along the lines of "I can't lose you." At least at some point. Thus by encouraging Josh to turn she thought she was protecting him.
There is also a possibility that since Nora had joined the roomies later, Ramona never accepted her. Something suggested by the fact that the drawings on her wall seemed to resemble the original three and if so she'd never added Nora. So she'd possessed Astrid to behave hostile towards her. And/Or either intended for or just didn't care if Nora had been killed as well.
Then she'd gotten very upset when she'd learned they were been evicted, that is when that line occurred I believe "You can't leave me". At least I think such an event occurred. When she'd earlier attacked the child of the family who'd been looking into the house and then killed Robbie once again she could have been trying to get rid of this threat.
It is also suggested that she didn't start to be influenced by or cause the deaths in the house and around the roomies until the guys moved in. It's quite clear she had not been the cause of Sally's original death.1.) Sally told Aidan the day she remembered Danny shoving her down those stairs that he'd always had a jealous temper that she'd blindly considered a heavy passion. This could and probably does also apply to before they'd moved into that house.2.) Remember in the alternate reality it was suggested that he'd still ended up killing the woman he was with but this time that woman was Bridgett not Sally and it did not occur in that house. 3.) It makes little sense for Ramona to kill Sally and then when the guys move in, turn around and consider her a friend.
All these points seem to disagree with the possibility of Ramona having possessed Danny to shove Sally down the stairs.
Conclusion: She only seems to kill those who are a threat to the relationship she pretends to have with the roomies. Though it gets confusing here even for me as not all make sense as her doing such as Rebecca whose death either time did not occur in the house, nor did Suren's, Julia's, Trent's or Henry's. These are all characters who were essential to the choice of roads which our roomies were presented with.
It's this kind of dangerous obsession which suggests that she has psychological issues.
But we'll see.