@animeislife4 no, seeing images in your head, like being able to physically see them as opposed to just knowing the concept of what you want is normal.
For me, I can’t see images. I have concepts and ideas in my head, but I can’t physically imagine them, which also means I can’t see faces in my head and therefore can’t imagine what Corpse, Dream, or Ranboo look like. Hence the joke of me calling them pretty.