That if i'm a creature from the astral plane.. would i see a hot naked chick as a hot naked chick arrousing? Or would i see her plump juicy soul for the taking? what does a soul look like from the astral plane? would would anything look like on the astral plane and if such a plane exist in/above/below underworld what would creatures/entities look like?

Perhaps you'd see it as an aura, or a wavy ghostlike blob, or a transparency of the person overlapping, or just a glowing sphere or ball of light. Or it could be a spirit image that appears to be rising from the person's back or coming out of them partially before going back in. If it was a simple glowing shape, the body could appear openened with black walls inside, and removing the spirit would make the body appear empty.