Bug-a-Booo ("Turma do Penadinho") is a Brazilian comic strip, created in 1963 and part of the Monica's Gang series. All of the characters are monsters or other supernatural creatures, none of them being a human being. The main location for their stories is a cemetery. However, their stories are not intended to be scary, actually they are sometimes classified as “Terrir”, which is a Portmanteau of the Portuguese words "Terror" (horror) and "Rir" (to laugh). On some of their stories, they have to deal with the fact that vampires, ghosts, zombies and mummies are no longer appreciated as characters of horror films. People instead are opting for assassins, psychopaths, serial killers, etc.
- Bug-a-Booo (Penadinho) – Bug-a-Booo is the main character, a short ghost. He is actually invisible, but wears a white sheet so he can be seen. In one strip, it is stated that he was engaged to a woman named Ernestina and was about to open a factory of disposable socks for people suffering from foot odor before he died. An unnamed friend of his reveals while regretting Bug's death in his death anniversary at his grave that he ended up both marrying Ernestina and opening the factory, though the factory closed three months later and Ernestina became obese.
- Lady MacDeath (Dona Morte) – Lady MacDeath is a Grim Reaper, the personification of Death who is responsible of going after all people whose time to die has come, although unlike a typical Grim Reaper, sometimes her body is not pictured as made of bones. She uses her sickle to kill people, by hitting them in the head, and then she takes their souls to the purgatory, for them to be judged and sent whether to hell or heaven (sometimes after much bureaucracy). She always carries a list with the name of the people she must kill on the day. Most of her stories feature a pursuit, sometimes punctuated with struggles faced every day by normal people. Maurico says that the purpose of creating her is "taking death less seriously, while it doesn't come to us."
- Vic Vampire (Zé Vampir, full name José Morcego (Bat) Vampiro) – Vic is a yellow-skinned vampire, and therefore, he is able to turn himself into a bat. He feeds on blood and fears crosses (even though he lives in a cemetery full of them), sunlight, garlic and holy water. In one strip, it is revealed that he was born 300 years ago in the fictional city of Transilvânia do Sul (South Transylvania), near Varginha and turned into a vampire at infancy after one of them bit his dog, which in turn bit him and his parents. Vic has the power to turn other people vampires with a bite on their necks.
- Moe the Mummy (Muminho) – Moe is a mummy of Egyptian ancestry. When the swabs which cover his bodies are taken out, Moe appears either invisible, as if the swabs were covering nothing, or as a dry corpse.
- Frank – A reference to Frankenstein, Frank is a green construct with a very weak brain, so that the virtue he least holds is intelligence.
- Wolfgang (Lobi) – A charming werewolf. While being able to talk, think and walk by two feet, he must live side-to-side with his canidae instincts, like chasing cats, urinating on lamp posts and trees, and howling to the moon. He hasn't an "official" human from, thus this form may change its personality dramatically from story to story. He has fangs, claws and yellow eyes.
- Skully (Cranicola) – Skully is single skull, which rests all day on top of a stone. He cannot walk nor move (although in some stories he is seen jumping around), but on the other hand, he provides fine conversations to whoever speaks to him.
- Al Ashmore (Zé Cremadinho) – Al Ashmore is nothing but the remains of someone who's been cremated. However, he is still able to talk, and jumps around just like Skully does sometimes. In most of his appearances, he is confused with dust and is attacked by broomsticks and vacuum cleaners.
- Sid Skully (Zé Caveirinha) – A full skeleton. He is clumsy and is always losing his bones.
- Sally Soul (Alminha) – Sally is Bug's girlfriend, although they are constantly seen having arguments with each other. Like Bug, she is actually an invisible ghost who wears a white sheet.
- Little Boy Boo (Pixuquinha) - The Bug's nephew. He is a child ghost.
- Espírito de Porco - In Brazil, pranksters are sometimes called "espíritos de porco" (lit. "pig spirit"). Espírito de Porco is thus a pig-nosed ghost who likes pulling irritating pranks on the other residents of the cemetery.
- de Sousa, Mauricio (October 2012). "Terror Moderninho". Histórias de Terror (Comics) (in Portuguese). São Paulo: Editora Panini. pp. 133–143.
- de Sousa, Mauricio (2003). "Que pena do Penadinho!". Almanacão da Turma da Mônica (in Portuguese). São Paulo: Editora Globo.
- de Sousa, Mauricio (2002). "Antes da Hora". Cebolinha (in Portuguese). São Paulo: Editora Globo. pp. 36–43.
- de Sousa, Mauricio (9 November 2004). "Como a Morte Nasceu" (in Portuguese). Monica's Gang official website. Retrieved 27 March 2010.
- de Sousa, Mauricio (October 2012). "Entrevista com o Vampiro". Histórias de Terror (Comics) (in Portuguese). São Paulo: Editora Panini. pp. 46–50.
- de Sousa, Mauricio (2008). "Namoro Seguro". Mônica - Romance (in Portuguese) (6th ed.). São Paulo: Panini Comics. pp. 132–135.
- de Sousa, Mauricio (2005). "A Roupa Nova". Mônica - Festas (in Portuguese) (47th ed.). São Paulo: Editora Globo. pp. 38–40.