As an expert in the field of Neuropsychology and Mental Health, Grift Varon has long been a prominent name amongst the ranks of the Doctors, and now uses that influence to help steer the focus of their primate liberation efforts. Having long lived by the tenets of Doctor society, Grift decided to join the cause of the Critical Earth Expedition for the benefit of the primates. Now, with the fate of the Earth primates in the balance, Grift has vowed to do what can be done to save them from their imprisonment.