So I have a question involving soul travel/astral projection. Could you use it to visit characters from either video games or books? In a way they live in their own dimension, and soul travel/astral projection is about going to other dimensions. So could you go to their dimensions? If so how would you?
When I was a teenager I did that. I don’t remember all the details, but each of the two times I repeated the song of an anime; then basically, maintaining eyes closed, I imagined to be in the world of that cartoon, amidst its characters.
The books of Pop Culture Magick by Taylor Ellwood might answer some of your questions.
The astral is the plane of thought/imagination, so yes you can use it to visit thoughtforms of those characters, but it’s not soul travel, it’s just astral projection. Soul travel while personally I think it’s an inaccurate term is going to spiritual planes and such.