Jolly is one of the seven dwarfs and a main character in the anime series The Legend of Snow White. As the youngest of the seven, he is considered the most inexperienced member of the group, though his age is roughly fifty years, which for a dwarf is comparable to human teenage years. His youthful nature is evident in his personality, which is characterized by enthusiasm, happiness, sensitivity, and an extroverted demeanor. He can be explosive and stubborn, with a childlike appearance that reflects his transition from childhood to adolescence. While he sometimes throws tantrums, he has a truly good heart beneath his impulsive exterior.

Jolly's primary motivation throughout the story is his deep affection for Snow White. He harbors a secret crush on her from the moment he first sees her, and this fondness drives many of his actions. He is willing to argue with his fellow dwarfs to defend her and allow her to stay with them, and he accompanies her almost constantly. His feelings for her also lead to moments of jealousy, most notably regarding her love for Prince Richard. In one episode, this jealousy causes a significant argument between Jolly and Snow White, a disagreement that both come to regret deeply. This emotional conflict highlights his sensitivity and the intensity of his personal attachments.

In the story, Jolly plays the role of a loyal and brave companion. Despite his inexperience, he willingly takes part in dangerous missions to help Snow White. For example, he is chosen alongside two other dwarfs, Camomile and Goldie, to sneak into the Queen's castle on a perilous raid to recover a letter from Prince Richard that Snow White is anxious to read. Their mission is fraught with danger, as they are eventually spotted by the Queen herself, who orders her guards to capture them. This demonstrates his courage and dedication, as he risks his own safety for Snow White's happiness.

A key relationship for Jolly is with the dwarf named Boss, who acts as a father figure. Boss raised Jolly from infancy and serves as a parental substitute for him, as well as a leader for all the dwarfs. Jolly's relationships with the other dwarfs are also important, as they form his family unit. His bond with Snow White is the most central to his development. The argument they have over Prince Richard is a moment of significant emotional growth, as the resulting guilt and regret weigh heavily on him. When Snow White later falls victim to a poisoned ribbon sent by the Queen, Jolly is the most distraught of all the dwarfs and becomes desperate in his efforts to revive her. This event, compounded by the subsequent heroic sacrifice of Boss to save Snow White, deepens his sense of guilt and sorrow.

While Jolly does not possess magical abilities, his notable traits are his emotional resilience and loyalty. He is described as clumsy, beardless, and quite naive, which distinguishes him from the other dwarfs. Nonetheless, his true heart and his willingness to defend those he cares about are his most defining characteristics. He may be the youngest and least experienced, but his actions repeatedly prove that he is capable of great bravery and deep feeling.