Comte de Gourmont is a French nobleman established in Switzerland during the late 1930s, collaborating with Nazi Germany. His actions stem from an obsessive fixation on Jeudi, a teenage girl he encounters who bears a striking resemblance to Hélène Durant—a woman he loved but could not possess in his youth. This unrequited past fuels his relentless pursuit of Jeudi, whom he attempts to force into becoming his mistress.

He employs manipulation and coercion, including abducting Jeudi and confining her within his castle under the pretense of making her a maid. He inflicts psychological abuse, particularly on his wife, Francoise, neglecting and mistreating her while openly pursuing Jeudi. Despite Francoise's enduring loyalty, he remains indifferent to her suffering, consumed solely by his obsession.

His ruthlessness culminates when he orders the assassination of Swiss General Henri Guisan, a historical figure opposed to Nazi expansion. This act causes his hired assassin, Tarantula, to abandon him, declaring that "the Germont I knew has just died." He further demonstrates his brutality by personally killing Hans, a repentant informant, to eliminate interference.

His storyline concludes during a hostage situation where Francoise, in defiance, shoots him. She chooses to remain by his side as their mansion burns, suggesting a mutual demise. This ending underscores his role as a manipulative antagonist whose actions lead to self-destruction.

His background as a French collaborator provides narrative complexity amidst predominantly German or Austrian Nazi figures. His obsession with Jeudi and Hélène underscores themes of possessiveness and the destructive consequences of unresolved past desires.