I’m looking for a book that emphasizes on character depth beyond the protagonist, preferably a poignant/melancholic read. It’s alright if the pace is dragging ←⁠(⁠*⁠꒪⁠ヮ⁠꒪⁠*⁠)

I don't like books that make it seem like the world revolves around that one character. I'd rather a book that doesn't indulge the main character but at best, simply borrows their perspective for the story.
I hope the description isn't too vague heh.