Ace is a cold and cunning man who is more of a lone-wolf type. He’s handsome, and can get easily angry and violent when faced with opposition. Ace was taken into the “Center” and labeled as just the “School bully”, because of his behaviors. 
He rarely opens up, and is bad at talking to women. Ace is also very physically strong and untrusting. (The “Center” is a game place where people are kidnapped and dropped to, to play games and fight or die just to entertain rich people who bid on players.)