In the surreal world of Galihabara, Da Vinci is one of many historical scientific figures who have taken on unconventional roles. Visually, he is depicted as an elderly man with gray, neck-length curly hair, a beard, and tanned skin, often seen wearing overalls that suggest his hands-on profession in the community. Like his rival Galileo, he has the ability to shift from his standard, more caricatured form into a dramatically idealized eight-headed figure, typically when he is trying to impress others or show off.

Da Vinci operates as a kind of handyman or odd-job center in Galihabara, a role that reflects the historical Leonardo's reputation as a versatile genius capable of tackling many different tasks. However, his most defining personality trait is an extreme fickleness. He is notoriously impatient and prone to boredom, leading him to abruptly abandon whatever task he is currently working on the moment a new idea or creative impulse strikes him. This behavior is best exemplified in an incident where he was called to repair a simple sliding door but quickly grew bored, tore apart the building to gather materials, and constructed a functional tank and a helicopter instead. This chaotic, almost destructive creativity underscores his nature; while he always intends to fix the mess he causes, his restless genius often makes the situation worse before it gets better.

His role in the story is largely defined by his rivalry with Galileo Galilei, known as Gali. Gali harbors a deep jealousy towards Da Vinci, envying what he perceives as Da Vincis superior genius and natural talent. This dynamic makes Da Vinci one of the only inhabitants of Galihabara that Gali struggles with, as their interactions often result in Gali being outshone or unilaterally defeated in their unspoken competitions. While the enmity is mostly one-sided, fueled by Gali's insecurities, Da Vinci seems to treat their relationship more as a source of amusement, occasionally provoking his rival just by existing. His talents extend beyond mechanics, as he is also a skilled painter who creates portraits of the town's residents, and this artistic skill is another source of his popularity, earning him many female fans and further fueling Gali's frustration.

Despite his chaotic tendencies, Da Vinci is portrayed as a fundamentally amicable if eccentric old man. He shows genuine kindness, such as when he asks the protagonist Marika to model for a painting and later ensures her safety during a chaotic escape from his collapsing helicopter by providing a functional parachute. In a town where science is taught through slapstick and controlled disasters, Da Vinci embodies the spirit of creative destruction, tearing things apart not out of malice, but out of an irrepressible drive to invent and explore new ideas. After the dust has settled from his latest whirlwind of creation, he can typically be found cheerfully fixing the very damage he caused, returning the town to a semblance of order until his next great idea arrives.