Lend me your energy

yes, “the eyes are the windows to the soul” and there’s something else that drives our body, the soul, it gives us likes and dislikes, (although that’s just psychological stuff) and ghosts are just the soul without a body, wandering without purpose

nah

nope

Well I don’t really call them “souls” after watching a little to much anime, but I guess.

Yes.

yeah, everyone has a soul, maybe multiple. the one in control is advised by the other who didn't win. I personally take souls from undertale, though, giving those i know colors representing their personalities...

Well... Matters what you mean by a "soul".
If you mean a magical "object" that drives our life, no.
If you mean a chemical reaction that causes life, yes.