Is there a spirit/demon attached to my family?

I have already made a post about this, and it got a pretty good view count but no comments. I’m seriously looking for answers here so I figured I would tell the story again in greater detail. So I’m going to start from the beginning. My ancestors on my grandmothers side are European, mainly french and english. I know she’s done ancestry before but I don’t specifically know if there are noted ancestors that were colonizers in early America. I promise this is important to the story so just bear with me. My family is native to New York, but when my mother was young they lived in Pennsylvania for a year or two while my grandfather helped start a new church in the town. He was a renowned pastor in their hometown, and offered help to a friend starting their own church. I don’t know much about their Pennsylvania home, but I do know that it was older, possibly built in the 40’s. One day, and this had to have been in the late 80’s, my grandmother was washing her hands in the master bathroom, she looked up at the mirror and saw a woman with long black hair behind her. She spoke to her, telling her that she was going to kill her. My grandparents are very religious, my grandma believes God gives his followers gifts, hers being clairvoyance. She’s seen spirits before, especially on trips to Scotland, and when she visited Thomas Jefferson’s house on one of the museum tours. So she assumed that’s just what this was. Clearly since I’m writing this, it’s not that simple. The second person in my family to see this woman was my aunt Tina in the early 2000’s. The eldest of my aunts, mother, and uncle. She had a dream of a Native American woman holding two twin babies, one was dead. She was crying. This dream saddened her more than it scared her, because she herself had a twin who died in the womb. but then it continued to happen. Each dream becoming increasingly terrifying. She saw the same woman, this time in a dirty white dress, chasing her, saying she was going to kill her. The third person to see her was my mother, the youngest of the children. She saw her around the same time, if not a year or so later, while she was in college. But it wasn’t in a dream, no, it was right in front of her near my grandparents house in upstate New York. She saw her hidden partially by the trees, staring at her. Less threatening than my aunt Tina’s experience, but it made it more real if that makes sense. Seeing her in real time and not just a dream. Flash forward a few years, maybe around 2010, my cousin Landon, my aunt Rachel’s (who is one of many in my family who have yet to see her) son, woke up abruptly in the middle of the night to the same woman with black hair, and a white dress, choking him. He saw her face to face, felt her hands on his neck. My cousin Mary, his younger sister, has a different father, they’re half siblings. She was the next to see the woman, only her experience wasn’t negative. Like Landon, she saw the woman in her bedroom, only, she was standing at the foot of her bed, almost watching her protectively. Then she walked off, vanishing in thin air. Mary’s story is the reason I am telling the story online. I was the last person in my family to have seen her. It was 2017, me and my younger cousin Isaac were sleeping over at my grandparents house (most of my family now lives in the south at this point, including me). My grandfather used the sun room as an office, with a desk to the wall across from the entrance from the main house, and a day bed with a trundle on the left wall. That’s where me and Isaac slept. I had a dream of the woman, chasing me, and she told me that she had to sacrifice me. I had two dreams, one where I was being chased in a field, another where I was being chased in some sort of movie theater. This was before I knew anyone else had seen her, and it scared me so bad that I went to my mother about it, and she told me about her and my aunt Tina’s experiences. About a week ago, my cousins Mary and her younger brother Matt were talking about witchcraft, and Mary asked me if I had seen the woman so I shared my story. We started theorizing on who she may be, whether she’s a spirit or some sort of generational demonic attachment. Mary had an idea, on her and Matt’s father’s side she has native El Salvadoran ancestors. She suggested, what if this woman is a vengeful Native spirit, and that’s why she didn’t threaten her. Which brings me back to the beginning of this post, what if my ancestors did something terrible to Native people in early America, which lead to a spirit seeking revenge? This is why I’m posting, I’m hoping someone knowledgeable about attachments can help my family get some answers, Mary and Matt suggested I post on here in the first place. If it’s what we assume I want to help the spirit, I want to know what she may want. And I want to do it safely. If anyone knows anything please leave a comment. (All the names I have used are fake to protect my family’s identities.)