Board Thread:General Discussion/@comment-6192846-20130929130231/@comment-6192846-20140129004612

Seth experimented with making vessels of sin. I wouldn't be surprised if OSS Act 3 shows that he and Irina are behind the events of Abandoned. I may have posted the theory in another thread, but I was speculating that perhaps Seth was trying to make Irina into an artificial Demon of Sin.

It's a bit off basis, but he does put her spirit into a red cat (vessel) which allows only those possessed (or made human vessels of [Mikulia]) by Demons of Sin to understand her, gives her an immortal life (apparently even if her cat vessel is destroyed) and gives her unique abilities as a result. If he was interested in HER and making vessels that simulate it's symptoms, that would make sense. Still no endgame but that's the best I can come up with. XD