A detective and former Marine who becomes one of the few allies in Mary Pat’s search for answers. Despite the community's distrust of law enforcement, he shares a similar goal of discovering the truth.

The most powerful criminal in South Boston, based on the real-life figure James “Whitey” Bulger. Despite having few direct appearances, his influence and criminal activities impact the entire community.

A drug dealer who stands out in the neighborhood for being the son of a prominent figure’s girlfriend. He is marked by his intellect and lack of remorse for his actions.