Character name: Nero Falkov
What's his dark-side?: While Nero comes off as an attractive, intelligent male, he is no one to be trusted. Surface level he's quite simple, but once his facade of generous, intelligence, and confidence traps someone in, he changes. Despite thinking he is always in the right and not thinking what he does is negative in any way, he becomes sweetly manipulative and over time crushes down their views.
It's possible he isn't even aware of this. That's why most of his friends are followers and not hard thinkers as he surrounds himself with 'yes' men who can easily fall into his web and be consumed. However, he does enjoy a challenge, and people who don't easily get absorbed, but he only ends up clashing with them and they normally end up in a fight or argument. Because of his arrogance, he may be intelligent but he makes foolish mistakes.
He is a very flawed and toxic being and improvement is unlikely until someone stubborn enough sticks around to make him understand his flaws.