Board Thread:General Discussion/@comment-6192846-20140918010005/@comment-6192846-20150106223732

Keep in mind that so far (in the west), only Elphegort has a population of monocolor-haired natives. Jakoku's cultural heritage is unknown so who knows when or where black hair entered the bloodline.

If the Gackpo character in HY is from the Octo line, then his hair should've been black, not purple after (presumably) several hundred years of intermixing. We just don't know enough information to be sure imo.

Octofan wrote: Well, the whole demon island thing I think is interesting--we keep getting that "Demon person" motif with the Gackpo characters. I think for now it's okay to translate it as The Skull at Onigashima, if mothy is going to go for the same kind of effect as Jakoku and force a Bilingual Bonus. I think it would be for the best. "Oni" can also mean "ogre" or "dead spirit" in different contexts so the Japanese name would safely avoid potentially mistepping the translation. After the song's out and we learn more info, we can always come back and more literally translate it as "Demon Island" or whatever.