User blog comment:Noctosphere/Who do you think should be the Big Bad of S12/@comment-10889355-20170528040250

Main: Lucifer, Dr. Hess, Arthur Ketch and the British Men of Letters. Ketch has been a threat to the boys and Mary ever since his introduction.. I thought this was obvious? He's definitely a main villain.

Secondary: Lady Toni Bevell, Mick Davies, Dagon and Ramiel.