User blog comment:IamJakuhoRaikoben/Chapter 454: Flying Dragon Squad and Osprey Squad, Review./@comment-24102956-20150930210424/@comment-24102956-20150930214529

Right... In Fairy Tail's ideology, they never killed anyone. Not even once since Mavis' generation during the Second Trade War. If they really actually killed someone in the series, they might traumatized in taking one's life by their hand. Didn't they preach in their nakama speeches all the time that they'll not kill an enemy no matter what.

Ask some of the bad guys who got trashed by Fairy Tail yet they're still alive. Or even Ultear who once suggested to kill Rogue for Future Rogue to cease to exist but Natsu rejected the idea and told her that "Thou Shall not Kill" speech.