Well, what a story!
I don't have enough knowledge in Kanjis, Furiganas and romanization to say who has right here.
Just I think that Layzee has some expected arguments.
I notice too that for the OAV directed by Rintaro in 1988 (so an adaptation from the manga, with the same character Deimos), Anime News Network and Wikipedia (and other reputable sites) put "Akuma No Hanayome" for the translation. That's just a remark...
http://www.animenewsnetwork.com/ency...me.php?id=3327
http://fr.wikipedia.org/wiki/Rintar%C5%8D