Since Yogev gave them an actual choice to leave, Lexie was the first one to leave that place, forced with two mages from district 2, everyone left on their own, but she was forced to leave because they all knew that she was going to try to assassinate their leader.
And even when she left she never tried to join any of those who left either, she stayed alone all that time.
The first days were the hardest, that void and rage inside of her heart made her go insane, she couldn't handle the loss very well, after her father's death she was their protector, and somehow all she could think about right now was that she failed her mission .
The first week she returned to her destroyed house trying to find any shreds of life in it, she then went to Arino's house and there she saw his house wrecked too , she searched there for days for an indication that they might be okay but she didn't find anything.