Avalitia

Avalitia is a secret entity, whose true form is originally known only to Aerinse and Tyris, who have come back from the future to release Avalitia. It is supposedly locked away in Asteria.

Background
When Aerinse and Tyris claim that they have arrived from the future to release Avalitia, Jake(?) tells them to quit joking, saying that "Avalitia is a monster from a children's fairy tail".

It is currently unclear who or what Avalitia is, but the entity plays are major role in the plot of Blue Protocol, and could be connected to your missing memories..