Where did the Moon Cell Automaton come from? And who made it?

[Wandering Swordwoman]

yeah, but the good one only got replay for one or two times. I didn't ask it to be played on every fight or whenever the antagonist showed up or whenever they had deep conversation

But whatever I guess, what's done is done

[SirGauoftheSquareTable]

Another thing I must add is while the OST seems unimpressive when played on its own, for the most part, it really works well when actually watching the anime. It acts as a nice background to scenes and ebbs and flows with the tension.