The author seem to retcon Mochizuki's memory since c3-c4 - now he IS able to retain his memories during transformation for some reason. Not sure I'm in favor of "evil overprotective dad" premise in this series since he has a solid reason to take action (really, how the heck can you "watch over" Kawaru, send tons of staff to ensure MC never bleeds?), but well, plot armor always wins.