Little Arturo is a supporting antagonist in the anime Demashitaa! Powerpuff Girls Z, adapted from the original American series. She is a member of the Gangreen Gang, a group of green-skinned juvenile delinquents who cause trouble in Tokyo. In contrast to the original version of the character, who was a young boy, Little Arturo is depicted as a girl in this anime adaptation. She is the shortest member of the gang and retains the rapid, clipped speech pattern associated with the original character.

Little Arturo comes from a large family, being one of ten siblings. Because of the size of her family, she is frequently overlooked by her parents, which contributes to her seeking attention through mischief and affiliation with the Gangreen Gang. Her personality is marked by a very low threshold for patience: she becomes restless and fidgets if made to remain still for any length of time. This impatience drives much of her behavior and makes her the least calm member of the gang. Her motivations are not deeply explored, but she appears to act out of a desire for excitement and a need to feel noticed, likely stemming from her neglected home life.

Within the story, Little Arturo functions as a minor recurring villain. She and the rest of the Gangreen Gang serve as obstacles for the Powerpuff Girls Z, often engaging in petty crime or schemes that the heroines must thwart. She does not have a major personal arc or significant development; her role is primarily that of a comedic or background antagonist. Her key relationships are with the other members of the Gangreen Gang, with whom she collaborates, and with the Powerpuff Girls Z, who are her adversaries.

Notable abilities include being the fastest member of the Gangreen Gang. She can move quickly, but she rarely uses this speed effectively in combat. Additionally, she tires out very easily, limiting her endurance. She has no other special powers or advanced skills, relying instead on her gang's group tactics and the element of surprise.