Black Maria is one of the Tobiroppo, the strongest six Shinuchi of the Beasts Pirates. She owns her own brothel on Onigashima near Kaido's mansion. Due to her actions and role, she is a supporting antagonist in the Wano Country Arc. Black Maria is a youthful woman of incredible size by human standards, at 8.2 meters tall being similarly large as Kaido himself. Her long blonde hair is styled like a geisha's, with two swords notably being part of its arrangement. Her eyes are sky blue, and a strand of hair tends to dangle in front of her left eye. She has a pair of long, slightly curved red horns atop her head, wears prominent lipstick, and carries a long smoking pipe. She wears a low-cut dark kimono that leaves her right shoulder exposed and an obi around her waist, both with floral patterns. In her Zoan form, her spider forelimbs each bear a personalized Jolly Roger, indicating she may have them tattooed on her original body. Black Maria appears to have a flirtatious personality, coyly expressing her approval at Ulti's short-tempered attitude and choosing to stay and flirt with Kaido instead of completing an official assignment from her captain himself. However, she along with the other Tobiroppo members became serious and shocked when Ulti spoke rudely about Kaido.
She appears to be empathetic and compassionate. Unlike many of her crewmates, she seems to have no inclination toward sadism, at least towards children, lovingly carrying a brutally beaten Momonosuke and letting him rest on her lap. She later showed visible discomfort at Orochi's plan to crucify and humiliate the already brutalized child. She does not seem to seek violence in general, as she preferred to sit with Kaido rather than find Yamato to gain the right to challenge an All-Star, and later camped out in a room with a few subordinates and played music rather than fight back against the invading Ninja-Pirate-Mink-Samurai Alliance. Black Maria also has a passive approach in dealing with enemies, preferring to used traps and trickery to subdue them instead of aggression as shown when she set up a trap to capture Sanji. She even admitted to the chef that she preferred not to fight and cause chaos in her room. As one of the Tobiroppo, Black Maria holds great authority in the Beast Pirates, with only Kaido and the All-Stars ranking above her. As the owner of the Woman Trouble, she oversees the goings-on in it. Though Black Maria's combat ability has not yet been witnessed, as one of the six strongest Shinuchi, she can be assumed to be very powerful, potentially worth challenging the All-Stars for their position. Befitting her oiran image, Black Maria is a skilled musician, being a capable shamisen player and songstress. Black Maria has shown to be extremely crafty and strategic, having collaborated with her subordinates to come up with an ingenious trap to subdue Sanji, one of the strongest members of the Straw Hat Pirates, by taking advantage of his obsessive chivalry, having Sarahebi feigned being sexually harassed while she used her spider web to trap Sanji, allowing Sarahebi and another Beasts Pirates member to effortlessly subdue Sanji.
Black Maria ate the Kumo Kumo no Mi, Model: Rosamygale grauvogeli, an Ancient Zoan-type Devil Fruit that allows her to transform into a Rosamygale grauvogeli, a prehistoric carnivorous spider, as well as into a human-spider hybrid. She possesses several spider abilities, including shooting webs from her body to trap opponents and walking on walls and ceilings. Black Maria and the other Tobiroppo members arrived at Onigashima during the Fire Festival. Kaido had them brought into his fortress, and as they waited to meet with him, Black Maria enjoyed watching Ulti become confrontational with anyone who annoyed her. However, she and the other Tobiroppo members became shocked when Ulti spoke rudely about Kaido as she questioned the purpose of their meeting. As the group came before Kaido, he gave the six the mission of finding his son Yamato, saying he would let them battle one of the All-Stars for their post if they succeeded, with Black Maria noting that such a mission would be difficult. Instead of searching for Yamato like her comrades, Black Maria decided to stay with Kaido and Orochi. After Kanjuro arrived with the badly beaten Momonosuke, Black Maria tended to the young boy's injuries and let him rest his head on her lap. However, he was soon seized by Orochi, who revealed his plan to have Momonosuke crucified, much to the discomfort of Black Maria. As the Ninja-Pirate-Mink-Samurai Alliance waged war on Onigashima, Black Maria received a call from King informing the Tobiroppo that the challenge for an opportunity to fight the All-Stars was cancelled, and that they were to stop the enemy alliance from getting to the roof of the dome, where Kaido was fighting the Nine Red Scabbards. Rather than engage the invaders, Black Maria and her subordinates retreated to the castle's tatami room, where they intended to wait out the battle. To help pass the time, Black Maria played her shamisen and sang a song about two lovers meeting beneath the moonlight. She later met Sanji after two of her subordinates lured him into a trap and captured him. Brought before the Tobiroppo member, Sanji exchanged banter with Black Maria, who admitted that she had a soft spot for "boys with rough edges" like Sanji. Although initially insulted by Black Maria referring to him as a "boy", Sanji soon became smitten with her.When Sanji tried running away, Black Maria activated her spider hybrid transformation and chased after him, saying she wanted him to stay as her pet.
