I just finished reading 'The Dinner' by Herman Koch and the characters are... well, a lot. The story is told from Paul's perspective, and I never trusted him from page one—the way he describes everything and everyone is so off, like he's performing normalcy while judging everyone else. His wife Claire is quieter but she's got this steel core; when the truth about their sons comes out, her pragmatism is scarier than Paul's bluster. Serge, the brother, is this politician obsessed with image, but his wife Babette surprised me. She seemed like a frivolous side character, but her reaction to the crisis was the most human and devastated.
Then the sons, Michel and Rick. You barely see them directly, but the entire book orbits around the horrible thing they did. The parents' debate over how to 'handle' it exposes every ugly family secret and societal pretense. It's less about who they are as people and more about what they represent—generational failure, moral decay. Honestly, after finishing, I needed a shower. The characters aren't likable, but they're mesmerizing in their awfulness.