Board Thread:Ninjago Wiki News/@comment-36150137-20180717132933/@comment-30499831-20180718212722

Unless there's a time-skip at the end for a few weeks or he's aging even faster now, it'd be weird if he jumped from teenager to old man by the end of the season.

Wu will age normally once he returns to his real age. As normally as an Oni-hybrid can age.