OK , I'll explain. At the end of the fanfiction the main antagonist Hisashi who posses the same power as Ted will explain that Ted is originally an angel. I still have to think about some details like why he's sent on the Earth , but the main reason why Ted is level 6 is because he's an angel and now from defeating many opponents on the Earth he'll evolve in Archangel. Also he'll never remember about his life before the Earth. And if you ask why a normal angel will evolve into Archangel from just fighting my answer is because he was almost Archangel in his past and when he was sent here he just finished his evolution. That explains why he can control so many powers and why he is level 6. And about how many people he killed. He killed every person whose power was interesting to him in the past so he's an serial killer
. I'm joking. He only absorbs one brain cell after defeating the opponent and that way he upgrades his DNA.
P.S: Touma won't appear or at least he will be only a side-character.