Gamma agent in the Foundation
It’s pretty obvious why Type O is considered a ‘Gamma’ – even ‘at rest’ he resembles nothing so much as the mutilated corpse of something only approximately human. When active, all traces of normality vanish as his body spreads into a network of unidentifiable vessels and organs that can link into the anatomy of other people. Personality-wise, however, he is pleasant and polite, speaking eloquently in a slight German accent.
Extracted from East Germany by probationary Alpha agents during their first mission. Currently residing with the Foundation (exact location classified).