Secco

Secco is an antagonist from Part V: Vento Aureo. He works alongside Cioccolata and is ordered by the boss to kill Buccellati's group.

Very little is known about Secco, as not even the boss was able to find concrete information regarding his past. Apparently he was once a patient of Cioccolata, but shared Cioccolatta's warped mind and thoughts of spreading suffering, Secco obeys him as if he were a pet. Cioccolatta sends him to film people's expressions as they die while he tortures them with his Green Day and occasionally rubs Secco's head for doing a good job and rewards him with sugar cubes.

(Source: JJBA Wikia)