User blog comment:Derax-Pagani/Chapter 509: Kagura vs. Larcade Review/@comment-7418318-20161107191643/@comment-1776824-20161108233019

Or it's exactly as Misk said, and the fact that she was sad when Makarov died just means she's a human with human emotions. As we've seen, the Ankhseram curse doesn't make one inhuman, Zeref can still show joy, sadness, surprise and the like and not kill people. It's just how it works. Right now, the curse is dulled, and the curse cannot just "transfer;" it can only be bestowed by Ankhseram, and there is no evidence whatsoever that it can be transferred or taken away.