Duke Inferno

Gender: Male
Species: Fire Demon
Title: Southern Emperor
Lore Path: Destruction (Pathstrider)
Factions: Annihilation Gang, Ever-Flame Mansion
World: Fetora
Relatives: Akash (Son), Dubra (Daughter), Caterina (Daughter), Constance (Daughter)

Duke Inferno is the leader of the Ever-Flame Mansion, a faction of the Annihilation Gang, and archenemy of the Jepella Brotherhood. He has four known children: Akash, Dubra, Caterina, and Constance.

Duke Inferno is a Fire Demon. He appears to have a skeletal, goat-like head, with a burning body and a monocle on his right eye. His outfit is seen in the Relic Set "The Ashblazing Grand Duke," including the Fetora crown, white gloves, a black robe, a black suit, a white shirt, a red necktie, and black and red boots.

(Source: Honkai: Star Rail Wiki)