Adui
But... it makes not much sense that most Celestials keep their memories in the face of time reversal, and that the founder can even break the time reversal. In that case the founder would notice and break the time reversal regardless of location. Because the time of the whole universe is reversed, not just at the location. Even when it was used a few weeks before... he should have noticed and broken it immediately -.-' Somewhat of a plothole if you ask me...