Mika

Discipline is Hellfire. They call her the Stygian Succubus

Capacity is the greatest among you four. However, it is also the most dangerous – the most likely to bring catastrophe. The blood in your veins, that of the Prince of Devils, can spiral out of control quicker than you know. If that were to happen, you’d lose yourself. Little by little, it would eat you up until you no longer existed as Mika. Your kindheartedness would vanish, and all that would be left is death.