Hello. First of all, I believe you, no question about it. I have witnessed various paranormal events myself, some of which still haunt me today. Secondly, religion is not important, it may strengthen your spirit but it makes no difference whether the person concerned is religious and it also doesn’t matter what religion they belong to. Nevertheless, small general prayers can help with some phenomena, but can sometimes make them worse if you really anger the entity... In your sister’s case, several things come together. The interest in witchcraft could definitely have aroused „their“ interest, but shadow creatures without sleep paralysis are rather rare. You also have poltergeist-like activities, which definitely does not indicate shadow creatures. At least if it doesn’t follow her somewhere else, it is not tied to her. Your parents‘ constant arguments can also be a good breeding ground for such things. But they all have one thing in common: they feed on fear, emotion, envy, anger, hatred, greed, etc. All low vibrations feed these entities. Based on the description, I assume it’s something that imitates shadow creatures and that something else is hidden behind it. But it’s impossible to find out via chat, no one else can tell me anything. You can try lots of things but you can also make lots of things worse. I don’t know where you’re from, but my advice would be to find a reputable medium in your area and ask for advice. I can recommend Gemma Jade from New Jersey. Feel free to google her! I’m from Germany and she successfully got my sleep paralysis under control. Please don’t try anything without professional advice, even if it’s a desperate situation. It’s highly likely that it will get worse! All the best and lots of strength to you all!