User blog comment:IamJakuhoRaikoben/Chapter 454: Flying Dragon Squad and Osprey Squad, Review./@comment-10301320-20150928063128/@comment-7418318-20150928075646

It also happens to be the name of a plane that with variable engines capable of VTOL: https://en.wikipedia.org/wiki/Bell_Boeing_V-22_Osprey :P

But I doubt Mashima was going for that. ^^