When adopting the persona as a first-string member of the Noah's Ark Circus, Doll appears solemn and taciturn in expression and manner. However, when disguised as Freckles, Doll is cordial, welcoming, and somehow innocent, befriending Ciel shortly after they were named tent mates. She seems to judge it a necessity to look after him, waking him up when he oversleeps, sharing her food when he doesn't get enough, and teaching him how to be a better performer. Her eagerness to make and be surrounded by new friends is supported by the fact that she often adopts the aforementioned alias because she dislikes sleeping alone and staying with someone else "makes her sleep better sometimes." She's relatively naïve, though, and gullible enough to believe the lies Ciel tells her - she easily forgave Ciel when he claimed he was stealing items - something that the other circus performers reprimanded her for multiple times. Doll isn't modest, as shown when she attempted to get Ciel to take a bath and offered to wash his back for him. She even allowed him to touch her chest - in fact, she'd unflinchingly laid his hand there - to prove that she's female, and gave him permission to "take a peek downstairs." Furthermore, Doll's exceedingly loyal to the other first-string circus performers and was devastated upon hearing news of Joker's death. She views all of them as family; she calls the other first-string members her brothers and sisters and Kelvin her "Father." Doll, who originates from the East End, speaks in Cockney English.Doll grew up in an alley in the East End, referred to as a gutter, with the other first-string circus members (minus Snake). Joker stated that they came together because they were each defective in a way. In Doll's case, her left eye is burned and marred because her parents raised her too harshly and consequently deformed her. As thieves, they were unsuccessful and barely managed to survive. Ten years ago, Doll rushed up to Joker one day with a tooth in her hand. She gleefully exclaimed that it fell out, believing that she would later get a coin from the Tooth Fairy and promised them that she'd buy them all bread afterwards. Unbeknownst to her, Joker, Beast, Dagger, Peter, Wendy and Jumbo worked on manual chores earnestly all night long in order to earn a single coin for her. The next morning, an oblivious Doll showed off her coin to them, stating how happy she was that they could eat bread with it. However, in the belief that the Tooth Fairy would give her more coins, Doll later attempted to take out more teeth that weren't wobbly, to the dismay of the others. One day, Kelvin found them in the alley and allowed them to come to live at his estate, where they lived in relative luxury. Sometime thereafter, they decide to create a circus. Joker gave them all stage names, including Doll, who initially tried to refuse the name because she believed it doesn't fit her. Joker dismissed her complaint, saying that of course it did because she is their "cute little sister." Her birth name is unknown.