It would be even nicer if Gache's loss of memories (and heart?) was connected to Roda turning from a dog into a human. Like that was the price to pay for transforming her. Although I don't know why he would have done it willingly so it would be better if somebody else did. But I expect it to rather be connected to something he found - and was consequently taken care of by the guardians of that whatever, like the shady Reverse fellow, Lawrence.