Well, when it comes to your own home, you can use what you can call “castle doctrine” of the spirit world. If the home belongs to you, you have every right to order it out.I think this one that i keep seeing is draining my energy because every time i see a shadow thing I’ll be very down and moody or not myself the next day or irritable and very drained. The scratching and bruising usually occurs randomly as in sleeping i never see what’s doing it and don’t really feel anything touching me but when i noticed this happening i started inspecting my legs and feet before bed and would have nothing there at night but in the morning I’d have tiny scratch marks or bruises. As for measures to protect myself or keep them away i either pray or read from the Bible when i get these occurrences or sleep with my tv on and it helps relax me but the feeling of someone watching me or being over my shoulder is always there. I also dream very seldom but when i do i always remember it vividly and they’re either very strange or nightmares and i dream on demons trying to get me in my house often and it feels so real then i wake up
As for the draining of your energy, I think you can benefit from learning how to shield yourself.
How to Magically Ground, Center, and Shield