Martha (Sinner) | Human in Hell series

Martha is a sinner demon and a minor antagonist of Helluva Boss who made her debut in "Murder Family".

Martha was the wife of Ralphie and the mother of two unnamed children. She drove Mrs. Mayberry past her breaking point after she was caught sleeping with the latter's husband.

At some point, Martha had an affair with Jarold, the husband of Mrs. Mayberry, which when caught, Mrs. Mayberry in a fit of anger drove to her house, attacked them both with a chainsaw before shooting them and then herself. Martha managed to survive this attack and was deemed a "hero" by everybody, even getting money from talk shows and donations while retaining an innocent façade to the outside world.

As a human, Martha sported the appearance of a tall, hourglass figure and peach bud-skinned Southern Belle with wavy, hip-length blonde hair.

As a sinner demon, Martha retains her body shape, but with more devilish features, as her skin has become red with her hands being black. Her hair is longer, thicker and bushier, and is now colored in a shade of grayish-purple with thin red streaks on the darker-colored highlights.

Her left eye has a black sclera with a pink iris and a slit pupil, while her right is an empty black socket with black blood dripping out of it, as a nod to the wound that led to her death, and her upper eyelids are colored in a darker shade of her skin. She now sports black cloven hooves, a mouth with sharp teeth and dark red lips, and a pair of branch-like black horns with red accents protruding from her head.

As shown in the 2025 pride month merchandise, Martha has a long tail with a black, vaguely pine tree-shaped tip.[1]

Martha retains the same outfit, but with certain differences - her earrings are black skulls with red eyes, her top now has tears on the rims and with a black-trimmed, zig-zagged-shaped stripe running along the cleavage, and her jeans are longer and are now the same color as her horns

At first glance, one would assume Martha and her family would be "happy and wholesome", as Moxxie described. In reality, Martha and her family are homicidal maniacs who worship Satan and his "dark work". She also appears to partake in cannibalism and human flaying with her family. She is shown to sleep with other men many times, though it is unclear if she had an open relationship or if she used it to lure in victims or was simply unfaithful.

Despite being a Satanist, Martha has a poor understanding of how Hell works as she was unaware that earthly fire could not kill nor banish demons, which she realized after trying to set Millie and Blitzo aflame.

As a Sinner, Martha is biologically immortal, being unable to die from illnesses and unable to age, remaining the same age as when She died, thus can not die of old age and other natural causes. She also cannot die from any kind of damage to the body, and will recover from any injury, however, she can only be permanently killed with angelic weaponry.

She was capable of tricking most people into believing she was a nice person and was well-liked by them, even being praised as a "hero" after she survived the attack from Mrs. Mayberry.

As shown in her debut episode, she is experienced at handling weaponry, particularly firearms.