Nera had never used her power when she was with Dan's family, ever since that night, she didn't reveal herself and never used her power just in case Rei would be able to track her down. Because she knew that he would be able to do it.
After all, magic left traces.
Therefore, it became even harder for Rei to find her, where he only got a clue about Nera's whereabout after close to one year.
He knew about her because Nera had met so many people during these nine months she was with Dan.
And one fine day, when they were ready to depart to Karam continent, someone knocked on the door, where Nera opened it and saw Rei was standing there.
He was smiling at her, he looked relief, as if he just found his missing treasures. Probably that was right, because Nera was his treasure and no one could tell him otherwise.