>>4486635
It wouldn't be the worst ending, and Mimi remembering Sheena for eternity would be very sweet (until the heat death of the universe). But we're already kind of getting that with Ari, presumably remembering Seiran forever.
So I'm hoping/coping that with Mimi and Sheena, we're getting an ending with them growing old together and dying together. It's the ending they deserve.
That's also why I really loved the ending to Vampeerz, with Aria becoming human.