User blog comment:B214/Talk About What You Want! 3/@comment-108.224.166.119-20150214142937/@comment-25032153-20150217051101

they are kind mentioned in the series just in volume 7 were Odin was making and talking to them with the devils as his body guards. though he could start a cross over at the start were the main character means Gremory Group when they were protecting odin and choose to go to school where they were though as a person of the shinto gods. they then get picked to become a devil as well but to a different group. we also have a them mention though as the devils of the shinto religion is used in the kyoto arc.