User blog comment:- Darkchylde/Acnologia's Element?/@comment-190.203.218.96-20130205235442/@comment-62.235.214.7-20130514202621

as you can see, by the chapter where Sting and Rogue apears for the first time a "bow shooter" shooted an arrow and sting ate it so my theory is sting eats things which is holy element like normal things like yeah... the things you see every day, and rogue eats dark matter the opposite thing of rogue , but they cannot eat dragon-slaying elements