Cato is going to win. He's going to do it for Clove. He's going to murder those idiots from District Twelve, and he will relish in their blood and their pain. He will avenge Clove's death, killing Peeta in front of Katniss, to make her feel just an inch of what he feels. That pain, he would love to see in etched so plainly on her face.
And he will do it for her.
He can hear her, screaming his name, louder and louder, and the fact he couldn't do anything about it. Just hold her hand and pray she feels better once it's gone, once she's gone.
Maybe he lost the last of his humanity whilst he was begging her not to leave him. Maybe he never had any but in the times he spent with her just before the games, he managed to salvage the dregs of it. But either way, now it's gone; now he is a savage, driven by something that might be human, but twisted in the turn of events.
He grinds his teeth together, almost painfully, ready to kill, ready to win.