User blog comment:Derax-Pagani/Thoughts based on 366: 1,000 Souls/@comment-4449950-20140109222000/@comment-7418318-20140109225036

When Ultear broke out of the institude and secretly watched Ur train with Gray and Lyon, Gray and Ultear looked to be pretty close in age to each other. That would put several years between Ultear's father leaving Ur and Gray's hometown being destroyed by Deliora. At least that point of the theory doesn't work out.