Mist

That girl doesn't have a name and she doesn't need one. She calls herself Mist. She talks hard and deep. She swears when she needs to. She's an assassin. She has the power to control fog and smoke. She can make swords, spears, daggers, shields out of mist and smoke. Fog and smoke come from his own body. He can cover the surroundings with fog instantly. In the fog, he has superhuman speed and can see everything.