Martha

Martha is the main antagonist of the Helluva Boss episode, "Murder Family".

Appearance
Martha has light skin, bright pink lipstick, purple eye shadow, and a mole under right eye, in the same place as Millie's. Martha has big, poofy blonde hair, brown eyes, blue skinny jeans, red bracelets, and a skin tight cream colored shirt with red polka dots. red high heels, and big, circular blue earrings. she also has a bandage on her forehead.

When Martha goes crazy, her hair gets ruffled, her blue earrings turned into skulls, her pants become ripped, and she has sharp teeth and red eyes.

Personality
At first glance, you would assume Martha and her family would be "happy and wholesome", like Moxxie said, but Martha and her family are actually homicidal maniacs.

She is revealed to be a Satanist later in the episode as she talks about continuing his "dark work". She is shown several times to sleep with other men though it is unclear if she has an open relationship or she uses it to lure in victims. She also appears to partake in cannibalism with her family.