User blog comment:IamJakuhoRaikoben/Chapter 398: The Final Duels, Review./@comment-25111584-20140903065859/@comment-7418318-20140903125418

@Mook: You mean that Happy actually died when he boosted Jackal's exploding corpse into the sky, but he hung on as a ghost like Roubaul and Mavis?

I doubt that was the case, but it'd be interesting. Especially if either Mard or E.N.D. had the power to banish ghosts.