Spoiler alert for anyone not this far in the series. In D.Gray-Man Hallow it is noted that the Millennium Earl says that he wants to bring Allen Walker back to the Noah side. The 14th. But Allen than sinabi if he comes back he will kill the Earl and become the susunod Millennium Earl. That shocked everyone. Than Allen Walker regains controll of his body. And says i am an Exorcist born and raised for the Black order to stop and kill you. There is little hints that Allen might be the 14th a Noah. Watch D.Gray-Man Hallow episodes here. If your that far in the series yet. --->
link on KissAnime.com. Ypu can watch it also on RyuAnime.com and GoGoAnime.com. So enjoy. I hope this helped you out a little bit. :3
