Mioasthian
Legacy Name: Mioasthian

Mioasthian is the oldest of the sisters. Despite Rairetsu and Selkiae not knowing what a gender is she is fully informed that she is in fact a she. On her back she carries with her the town called Merveilleux. Mio cares for it as some animals would their young, while her brother Lapire cares for it more like one would a garden. Whenever Mio sleeps she can see the dreams of the living beings in the town. Often enough she enters their dreams and will play with the residents. In short, she is caretaker to this small place.
Mio has no human form. She also can not speak any language other then cooing and roaring noises. Besides playing with the humans in their dream world there's nothing Mio enjoys more then a simple petting on her head. Be mindful of all her eyes though, disturb any of the six and the next thing you'll know your inside of Merveilleux with a very angry presence crushing you.

While it might be confusing as to why she is the one holding a town on her back the answer itself is very simple so long as you try not to over think. Mioasthian has the power to transport 'things' to other dimensions other then her own. She is more like the bus station of dimensional travel, in the way that you never get to where you want to go and the fares are much to high. During the event with Rairetsu's attack Mio gobbled up all three of her siblings swallowing them so they may safely be held on her back until they recovered with whatever it was that had made Rai so berserk in the first place. Unfortunately the sickness spread to the world contaminating everything, and everyone inside. Mioasthian herself still remains illness free but will patiently wait thousands of years for everyone to magically get better.

Lastly, Mioasthian's form changes with each passing season making one area stronger then all the others.