Benvolio de Frescobaldi, also known as Benvolio de Fresco Baldi, is a central supporting character in the anime adaptation. His background is rooted in the nobility of the floating city of Neo Verona, as he is the son of the city's mayor, Vittorio. This status establishes him as a close friend and confidant to Romeo, the protagonist, from a young age, though the series notably alters his original literary role by not making him a member of the Montague family. He is a young man characterized by a warm and earnest disposition, typically dressed in attire befitting his former station, such as a light green tunic, which visually marks his noble origins.

Personality-wise, Benvolio is defined by his kind, level-headed, and thoughtful nature. He possesses a strong aversion to conflict and often serves as a calming influence, acting as the voice of reason for his more impulsive best friend, Romeo. While he is deeply loyal and caring, his sheltered upbringing as a noble leaves him with a notable lack of experience in manual labor or practical survival skills outside of his privileged life. This combination of innate decency and worldly naivete makes him a grounded and sympathetic figure.

Benvolio's primary motivation throughout the story is his unwavering concern for Romeo's well-being and safety. He frequently attempts to steer Romeo away from trouble, particularly with his father, the tyrannical Prince Leontes van de Montague. However, his motivations expand dramatically when his own family falls out of favor. After Mayor Vittorio publicly opposes the Prince during a council meeting, the entire Frescobaldi family is stripped of their nobility and forced from their home. An assassination attempt on them follows, from which they are saved by Juliet's faction of Capulet loyalists, forcing Benvolio and his family into hiding.

His role in the narrative evolves significantly as a result of this persecution. Initially serving primarily as Romeo's loyal companion and a figure from his past life, Benvolio becomes a direct participant in the story's political conflict. Forced to live as a commoner, he finds shelter with Curio, a friend of Juliet's, albeit reluctantly due to his lack of practical skills. From this new position, he continues to support Romeo, even delivering crucial information about the assassination attempt and expressing his faith that Romeo will one day become the duke who saves Neo Verona. He is also responsible for managing Curio's household after Curio flees, providing shelter to other characters displaced by the political turmoil.

Key relationships are central to Benvolio's character development. His friendship with Romeo is the core of his identity, defined by mutual care and loyalty. His time in hiding introduces him to a new community, particularly Cordelia. Although Cordelia initially treats him somewhat like a child because of his inability to perform menial tasks, a romantic relationship blossoms between them. Over the course of the series, Benvolio develops from a sheltered noble into a resilient survivor who adapts to a life of hardship. His arc culminates in a happy and stable future; by the end of the series, he and Cordelia are married and have a newborn child, providing a stark contrast to the tragic fates of other characters. Regarding notable abilities, Benvolio does not possess any unique combat skills or supernatural powers. His strengths are entirely personal, consisting of his diplomacy, his loyalty, and his practical role as an emotional anchor for Romeo.