Vincent Black (cursed form)

 You can't kill me, cause I'm already dead inside.

Vincent has this curse since he can remember. The point is, from somewhere in his childhood, he can't remember his past. He doesn't know where he's from, who his family is or what it is all about his powers and the curse. When the curse is active, his arm is affected and gets black to the middle of his right upper arm. Thorn-like outgrowths cover this black part, too. His fingers become claws, his teeth become fangs and his eyes turn red. Sometimes dark purple miasma floats around this arm.

The school calls this the "noroi no ude". All the teachers are aware of his state, but don't talk about it openly, so the pupils at the Kitakaze don't know it. There are just some rumours here and there. It's not fully clear how and when the curse activates. It's assumed, that it's tied to strong emotions or extreme situations. But there were exceptions proving this theory wrong.

Most of the time, Vincent can control the outbreak. The first state of the curse is his eyes turning red and mostly it doesn't go further. The next stages are the fangs and the changing arm itself. In the worst case he loses his self control and even his mind goes uncousious and the curse takes over. This is very bad, cause then, he will go berserk and harm others. It is to himself gaining back control or someone has to knock him out. But even then, the curse will not vanish on an instant. It might take minutes to hours or even days to fully change back to his normal human form.