グエロ

"Protect the people you care about, or protect the justice. You either chose one or you will meet the worst outcome."

The boss of the Neruda family, one of the five largest gangs in New Sieg.
He lived in Mexico for a long time because he was on bad terms with his father. When he's dead, Guero returned to New Sieg to take over the family's boss position.

He treasures the family and people of the town, but is ruthless towards enemies and traitors.
He is also known as "Goodman" for his polite manners.