User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-79.204.244.122-20140520152036/@comment-72.239.247.145-20140603005045

actually 7 years ago if going over timeskip and after gmg in manga mavis means when he visted tenroujima so it would not make sense since mavis has been dead for about 100years you find this fact in a chapter after gmg arc