Marta's knowledge of the town is well mapped, as she seems to able to maneuver through it with ease, even in the darkness. She is very strong, able to deftly use her pickaxe to kill anyone she views as an impending threat, as well as being able to smash through doors and wooden fences with very little effort. Marta seems to be a high-ranking enforcer of the Testament of New Ezekiel, as she is universally feared throughout the town. However, the storm rips off the roof of the building they are in, which detaches a metal cross from the roof which plummets down onto Marta and impales her through the chest, killing her. In the final section of the game, she chases Blake and an in-labor Lynn through a violent thunderstorm, and is right on the verge of slaughtering them both. This overall shows a level of awe and fear that Marta's own cult possesses concerning her displaying that she is someone not to be trifled with. This is further proven when pursuing cultists withdraw from chasing Blake as the area he stumbled into is one of Marta's patrol routes, and leave him to die by Marta's hands. So much so that when Blake encounters the townspeople in populated areas of the town, such as its central square, they will vacate the place indicating Marta's coming, even if they themselves are hostile to Blake. Marta can be seen killing random town folk for either questioning their faith or being suspected to be a Heretic. She is encountered several times throughout the game by Blake, nearly killing him almost every time. These sins were that Ethan denied Knoth his daughter, Anna Lee, and have "since sinned in denying it" (though she says "catamite to the devil" after she kills him which may be an insult or refer to something else).
When Blake is sheltered by Ethan, a seemingly sane resident of the village, she visits him to viciously slay him for his "sins", as well as for knowing of Blake's whereabouts, which he denies. Marta is first encountered by Blake while she mumbles gospel quotes and patrols the middle of the town at night, acting as its enforcer.