She has black hair done in braided pigtails and wears a green dress. She is a vegetarian who cares about nature. Carolina 'Carol' - A Julieta's best friend and possible love interest of Maluquinho.Has blond hair which stands upright, wears a black-and-red striped shirt, blue pants and tennis shoes. Like Maluquinho and Julieta, he also had his own comic that was released in 2007. Often gets stressed when his friends make fun of his little size. Junim (a corruption of Juninho, in turn an affectionate form of Junior) - Another of the Maluquinho' best friends, short in stature and with thick-rimmed glasses.He is a bit taller than the others and dresses all in blue. He has a little sister named Nina, that usually annoys him. Usually he is ingenuous and is induced to the conversations of his friends. Bocão (literally Gobber or Big Mouth) - Maluquinho's best friend, a chubby and glutton boy which often is always beside of Maluquinho in most of his plans and jokes.She has long, black, frizzy hair, wears a red T-shirt with a lightning bolt design (very similar to Captain Marvel's symbol), pleated white skirt and red and white sneakers. She had her own comic that was released in 2004. She has a blue pet cat named Romeu (a reference to the Shakespearean tragedy Romeo and Juliet). Julieta is cheerful, energetic, and talkative. She's also a 10-year-old girl, sometimes considered a female version as 'Menina Maluquinha' ('The Nutty Girl'). Aside from that, his main attire is a yellow T-shirt, black shorts and white and sky blue sneakers. He often wears a pan on his head as an improvised Napoleon's hat, an adult-sized blue jacket and brown dress shoes, both pieces looking quite oversized on him. He is always close to his friends Bocão and Junim, and is popular with girls (it is said in the book that he has 10 girlfriends, all at once), mainly Julieta. Maluquinho (literally Nutty) - The main character, an eccentric and playful boy, mischievous and troublemaking but good-hearted.

O Menino Maluquinho by Ziraldo