User blog comment:FairyRaven/Fairy Tail Chapter 315: Rosemary, Review and Commentary/@comment-16344653-20130118181526/@comment-16344653-20130118191452

lol no. Erza was around 10 when she was taken to the Tower of Heaven and Kagura looks to have been 5... or less.... And even if Kagura is currently physically older than Erza, Erza is still technically older because she was born first. :P