Morbus Iff, Ghyll Scholar
According to his recovered journals, Morbus Iff is "ethereally real and surreally not". Physically demented and officially demoted, this rogue scholar was once a member of the secretive Council for Quezlarian Research until he was found naked and covered in a brown fluid in some unremarkable civilian's basement. Although the Council won't reveal further details, they've suggested his work "deeply and perversely flawed" and have invalidated the research he performed for them. Exactly how he's making contributions to the Ghyll encyclopedia, or his current whereabouts, are unknown.