Chibita is a character originally created by Fujio Akatsuka, who appears throughout the various adaptations of the Osomatsu-kun manga and its spinoff, Mr. Osomatsu. His background and circumstances are notably fluid, changing from story to story. In his earliest appearances, he was often portrayed as an orphan or a homeless child living in a pipe in a scrapyard, frequently shifting between different family situations that sometimes included an older brother, a younger sister named Chibiko, or a cousin-like relationship with the character Totoko. This lack of a fixed origin became a consistent trait, with his status as a resilient, often impoverished outsider remaining a core part of his identity. Despite these variations, he is generally established to be the same age as the Matsuno sextuplets.

Physically, Chibita is most recognizable by his extremely short stature, standing around sixty centimeters tall as a child and growing to approximately one hundred forty to one hundred fifty centimeters as an adult. He has a bald head with a single, protruding hair and a distinct horizontal crease on his scalp. His head is noted for being incredibly durable, capable of withstanding impacts or even shattering teeth if bitten. His face features wide eyes, a pointed nose, and distinctive marks on his cheeks that resemble whiskers; an official explanation identifies these marks as hardened mucus stains from frequent nose-wiping. His typical outfit as a child is a single-button shirt, the color of which varies between adaptations, often red or yellow, worn with simple pants. As an adult running his oden stall in Mr. Osomatsu, he wears a yellow dress shirt with blue shorts and a red bowtie, usually covered by an apron while working.

His personality is a complex mix of resilience, mischievousness, and a strong sense of justice. He is best known for his stubborn determination and his refusal to give up, no matter how much he is bullied or pushed around, particularly by the Matsuno brothers. He frequently laughs with a distinctive Kekeke vocal tic and speaks with a rough dialect, often using phrases like Teyande barou chikusho, which conveys his fiery and street-smart attitude. While he is often the victim of pranks and bullying, he is far from helpless; he is a skilled fighter, often considered to be even more capable than Osomatsu, and will retaliate against his tormentors with cunning pranks and direct confrontations. Despite his combative side, he has a deep, childlike affection for animals, particularly cats and frogs, and a gentle love for nature, which contrasts sharply with his human interactions.

The most significant and defining motivation for the adult Chibita is his all-consuming passion for oden, a Japanese winter dish. His iconic image often includes him holding an oden skewer, typically composed of pieces like konjac, ganmodoki (fried tofu), and narutomaki. This childhood favorite evolves into a lifelong obsession; as an adult, his entire life revolves around perfecting his craft, to the point where he is depicted bathing naked in oden broth to improve the recipe. This passion is his primary motivation, driving him to become a responsible working adult who runs his own oden stall, a role that puts him in direct and frequent conflict with the lazy, jobless Matsuno sextuplets who often run up tabs they cannot pay.

His role in the story, particularly in Mr. Osomatsu, is that of a supporting character and a foil to the main sextuplets. He serves as a grounded, hardworking presence that highlights the brothers' indolence. He is the proprietor of a small food stall, a place that acts as a common setting for the characters to interact. While he is often exasperated by the brothers and seeks revenge for their transgressions, he is not purely an antagonist. On several occasions, despite his frustrations, he has come to their aid in times of crisis, demonstrating a complex and enduring, if often strained, connection to them.

His key relationships are central to his character development. His dynamic with Iyami is particularly important, shifting between mentorship, partnership in various scams, and outright rivalry. Chibita often aids Iyami in his schemes but is just as frequently betrayed by him, which can lead to vengeful retaliation. This bond is often framed as stemming from their shared experiences of poverty and marginalization, with Iyami acting as a kind of surrogate family figure for the often-homeless Chibita. With the Matsuno sextuplets, his default state is one of mutual antagonism and rivalry, a carryover from their childhood where they constantly bullied him. He frequently concocts vengeful plots against them, especially for stealing from his stall or threatening his pets. However, their relationship is not static; there are moments of neutrality and even reluctant collaboration. He also harbors a one-sided affection for Totoko, which often leads to dysfunctional interactions as he vies for her attention against the sextuplets.

Chibita has undergone significant development across different media. In his childhood during the Osomatsu-kun era, he evolved from a simple, often pitiful bullied figure into a more proactive and cunning trickster, even starring in his own spinoff series like Chibita-kun. His teenage years, explored in Mr. Osomatsu: The Movie, depict him as a melancholic and nearly suicidal young man struggling with his identity. In an attempt to distance himself from his predetermined path, he grows out his light brown hair, wears a wig, and trains as a French chef. It is only after encouragement from the sextuplets that he finally accepts his true passion for oden, leading him to become the confident, if short-tempered, stall owner seen in Mr. Osomatsu. This journey shows a clear arc from a resilient but downtrodden child to an adult who has found purpose and pride in his work, even as he continues to battle the chaos caused by the Matsuno brothers.

Notable abilities beyond his fighting prowess include his incredible durability, especially his head, and a surprising level of skill in scheming and pranking, honed from years of conflict with Iyami and the sextuplets. His sharp senses are also highlighted in his obsessive pursuit of the perfect oden recipe, a pursuit that requires a refined palate and dedication.