Subject 777

Before his body ended up in a robot, Chance was a kind, cheeky, charismatic, and confident gambler, not averse to losing his entire fortune gambling. He has wealthy parents and lived in a luxurious mansion before he became a Forsaken. He sometimes plays the piano and can play a couple of songs with his eyes closed. He wore a formal black suit with a white shirt and tie. He wore a black fedora with a white stripe and headphones (for style, not music). An integral part of his face were his black sunglasses, which always obscured his eyes, preventing him from reading his emotions. His expression was impassive, almost in all situations.
Chance is "cool, calm, sometimes smug," and "a reserved, unflappable guy." He's also eloquent and "often doesn't take things too seriously." He's also ambidextrous—he's equally adept with both hands.
But one day, everything changed. He went from being a survivor to a killer, as Spectre had wished. Without his own will, he was forced into an iron suit that only vaguely resembled his own design. Instead of eyes, he has glasses with images of casino slot machines. Occasionally, hearts might flash on them, but mostly, when he spots prey, three exclamation points appear on his eyes. After killing a survivor, the indicators spin, then display three sevens (the jackpot), and he utters the phrase, in his robotic voice, "Jackpot, baby!" Instead of a right arm, he has a six-barreled Gatling gun, and his spine extends into a tail, at the tip of which is a charging unit.
He is cruel, predatory and ruthless, but he can still be saved, because he does not do this of his own free will.