while yes takufumi gave that rant, uncle answer to it was very mixed, so i wouldnt say that it cant happen, after all, not everything goes well all the time, thats life.
im still waiting for the moment it clicks that they both do like each other, we may call her a tsundere but with how the uncle acts when she was in danger he really is no better.
So yes my biggest question was answered, the mana is not going to disappear it seems, only the personality that it had, good, seems like our team is not going to lose its job afterall.