He's weird man. He's really weird. From the moment he was introduced as a contestant in the first episode, something seemed off about him. It always seems like he's seething and can burst any moment.
All his personality and aura around him is because of his past status. Otherwise no one would have given two shits about him if he was a commoner. His smile always looks fake, and he seems to have a narcissistic attitude which is not completely out yet. It seems like he considers himself above other contestants and the game.
I suppose he's the alpha type, but can't be one currently because of the presence of seniors in the house. He doesn't want to be beta like other contestants, so is happy being an omega for a while.