I am writing my first novel in the third person semi-omniscient. I am aware that I ought to still structure passages from a primary character’s point of view, as in, if two or more characters are interacting in a scene, I can only relay to the reader what is going on in the head of one character; to do otherwise could get confusing. However, my protagonist has empathic powers, so, done well, might I use this mechanism to relay the thoughts and emotions of others character(s) in the scene or is this a rule that must never be broken?
Third person unlimited!
If your character is empathic (mind reader or just emotions?) you can have something very close to omniscient while maintaining limited omniscience - because your character has near omniscience when it comes to other people. I did something similar, where my MC could read minds. I treated the thoughts of others like a one-way conversation.
This makes a nice literary cheat, because you ARE limiting the view to your MC. They just happen to be able to see things others can't. It's similar to the POV of a precognitive, where they see things that might or will happen.