Re-watched ep 12 and realized what the implications this has...
Mami vanished from their small haven and to them it was like losing their lives again to cancer.
Mami no longer remembered Charlotte or Celosia and was once again a Puella who was ignorant of her fate.
She would never remember the time they bonded or the horrible truth that they had learned. Yet...They would be at peace knowing that reality had given them a second shot at redemption.
Charlotte and Celosia were re-united, not in a hell in which they were trapped within a confined space but now an open place that was beyond space and time in which they could do anything according to the girl with flowing pink hair like mist and eyes of gold that resembled the sun.
Charlotte thought about it and cheese came into existence and it was nothing like she had eaten before. She cried knowing she not only regained her human form but could once again be re-united with her love of food.
Celosia was over-joyed she was just alive. Years of being in her twin and being aware when her twin went witch caused her to emerge and go insane and devour everything in her path as spite.
Both girls were glad that the girl before them whom bore a resemblance to Charlotte but with gold eyes and longer hair was embracing them while they shed tears that made it rain on Earth.
They cried knowing all they had to do was wait for Mami and they could be a big messed up family again.