[malason13]

Originally Posted by cyberdemon

Spoiler for Tatsuya's origin speculation:

Personally I'm betting that eventually it's going to turn out that Tatsuya's actually Maya's child (or at least was born with her eggs since she can't actually give birth). Thus making him and Miyuki only cousins. That will certainly please Miyuki.

It could be possible that he was made by the ones who tortured Maya and a means to eventually fight the Yotsuba. The Yotsuba stopped this and captured him but feared Tatsuya for this rather than just for what powers he has and realized it would too difficult to kill him. Locking him up would probably be pointless because disintegration would be able to let him easily escape. So they performed the the procedure that striped him of memories and emotions instilling only devotion to Miyuki as a means to keep him under control. while also placing the link on him that weakened his powers

It is possible however I personally think that it doesn't make sense. I mean if he really maya's son and not miya's, how can you explain the guilt that miya has during the memory arc. That miyuki said that as if something she lost after performing the experiment?