User blog comment:GoDai/GoDai's Translations: T.U.S., Exis, and Phantaminum (Pentaminum)/@comment-88.117.84.188-20120623010019/@comment-1926430-20120625031454

Enryu actually might not be an Outsider. He could be someone from the Outer Tower that jut wasn't selected. Although it seems most Irregulars are Outsiders, I don't think this means all. We don't have enough information.