User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-4547267-20140114035651/@comment-1359322-20140114040208

I don't think that Great Red is plausible at all though, since like Ophis, Great Red is considered as a transcendental being. As to Issei, he's a Devil after all, a Devil making a pact with a Devil is......kinda weird.