I know that this idea is not totally 'revolutionary' as this type of narration has been used in Breakfast of champions, for example. But, Unlike Vonnegut, I want the 'Narrator talks to the characters and or reader' trope to be prevalent across the whole novel, where the Narrator interacts/gives opinions on/judges what is happening in the scene etc, and the characters themselves know that the Narrator is Narrating them.
(The narrator is just some sort of sentient... 'voice' that just narrates, but has opinions and judgements etc on things.) However, I cant seem to think of a good way of implementing this type of narration, and I'm struggling to not make it 'cheesy' or convoluted. I want to make it so that the reader does still feel immersed in my world, with the added uncommon experience of that type of narration.
Question: How can one write a narrator which interacts with the characters, but wont come off as UN-needed and wont ruin the immersion of the reader?