Cioccolata

Cioccolata is an antagonist from Part V: Vento Aureo, working alongside his partner Secco.

Ciocclata is a psychopathic sadist. According to Diavolo, Cioccolata was a former doctor dismissed from his hospital for a medical accident two years before the start of Part V: Vento Aureo. However, the deaths were not accidents but were just cover ups for Cioccolata to freely operate on them, diagnosing healthy patients ill before doing so. He would sometimes limit their anesthetics so the patients would regain consciousness mid-operation, allowing him to delight in the patient's suffering and death.

(Source: JJBA Wikia)