[Kleeyook]

^^for above ^^

Spoiler for Tatsuya's ability:

I think it's the fundamental mass-energy conversion law E = MC^2. He did it by disintegrate the mass into pure energy. He can't change the mass into something else that's not supposed to be like changing the color of a leaf from green into blue (if blue is not possible) but he can change it into brown or yellow (since the leaf has those pigments already). He can't create a limb for a limbless person but he can regenerate a limb from the person who just lost his.

I suppose all matter was created from energy hence he just reverts it back into pure energy. When he use disintegration he simply convert it into element that used to created things (like torpedoes disintegrated into metal, not energy, human into oxygen, hydrogen, carbon, etc.) which is a bit different from converting it into pure energy.