Ragazza is the young girl at the center of Angel's Egg, and she is never given a personal name in the film; Ragazza, a name taken from the Italian word for girl, is one of the labels by which she is sometimes known. She appears as a silver-haired child who wanders alone through a desolate, gothic cityscape haunted by ruins, strange machinery, and giant fossils. Her days are spent scavenging for survival, collecting water in glass bottles and observing the world around her, including the spectral fishermen who endlessly hunt the shadows of fish across the walls and streets. Her most defining possession is a large, mysterious egg that she carries tucked beneath her dress, held close to her body as though it were her own child, and she resides in an abandoned planetarium that serves as her sanctuary.

Her personality is defined by silence, innocence, and unwavering faith. She speaks very little, and her character is expressed mostly through her careful gestures, her watchful eyes, and her patient devotion to the egg. In a world that appears abandoned and forgotten, she embodies a quiet, trusting hope that stands in contrast to the emptiness around her. She is also cautious by nature; when she first meets the wandering soldier who carries a cross-shaped weapon, she runs from him in fear. Over time, she grows less wary and allows him to follow her, eventually trusting him enough to lead him to the place where she lives.

Her central motivation is preservation. She believes the egg will hatch into an angel, a bird that will bring salvation, and she protects it with total commitment, warming it, listening to it, and making its care the whole purpose of her existence. She has been told that the angel is inside, and she does not ask for proof; the act of carrying and guarding the egg gives her life meaning in a dead world. She also holds firmly to her belief that the bird from the story of Noah's Ark once existed, even when the soldier questions that possibility, and she shows him a fossil of a giant bird as evidence of her faith.

Her relationship with the soldier forms the emotional center of her story. He acts as both a guardian and a foil to her, since he is defined by skepticism and a need to confront the truth rather than by devotion. He steals the egg briefly at one point and returns it, telling her to keep it closer to herself, and the two form a tenuous bond as they walk through the ruined city together. He recounts a version of Noah's Ark in which the dove never returned and the people aboard forgot the world they came from, and he wonders aloud whether the bird ever existed at all. Their bond ends in betrayal when, while she sleeps, he smashes the egg and finds it empty, destroying the object of her devotion in an act of iconoclasm.

Her development traces a path from devoted innocence to tragic loss. When she wakes and discovers the shattered egg, she chases after him in anguish and falls into the water, where her final breath transforms at the surface into a great number of eggs, suggesting a cycle of sacrifice and renewal. In the closing imagery of the film, she is shown as a stone statue seated among other stone statues on a giant mechanical structure, which is ultimately revealed to be the fossilized hull of an ark drifting through a dark expanse, indicating that her spirit or legacy endures beyond her physical death.

Her notable abilities are more symbolic than conventional. She possesses the resourcefulness to survive in a barren landscape by scavenging for water and supplies, and she is deeply attentive to the egg, believing she can hear breathing or a heartbeat from within it. Her most significant ability is the transformation she undergoes at the end of the film, when her final breath gives rise to new eggs and her body becomes a statue, marking her passage from a guardian of fragile hope into a figure who, through loss, births new potentiality in a world that seemed beyond saving.