Joaninha is the central protagonist of the anime, also known by her original name Georgie. Her background is rooted in mystery and adoption. She was found as a baby by an Australian farmer in a forest and brought home to be raised as his own daughter. The only clue to her true origins is a golden bracelet she has worn since infancy, which holds a secret she is initially unaware of.

Throughout her childhood and adolescence, Joaninha grows into a beautiful and spirited young woman. Her personality is consistently portrayed as joyful and energetic. As a child, she loves to play with her two adoptive brothers. This core of happiness and energy persists, but her nature also encompasses great tenderness and considerable courage, especially as she is forced to confront difficult truths and challenging circumstances. Her naivety is a notable trait, largely because she is initially ignorant of the dark secrets surrounding her birth and the complex romantic feelings her adoptive brothers develop for her.

Her primary motivation shifts as the story progresses. In her youth, her main desire is simply to live happily with her family on the Australian plains. However, after facing the cruelty of her adoptive mother, learning that she is the daughter of an exile, and being cast out from the only home she has known, her motivation transforms into a quest for identity and love. She decides to travel to Britain to search for her real parents and to follow Lowell, the young man she has fallen in love with, who has also left Australia.

In the narrative, Joaninha is the central figure around whom the drama and romance revolve. The main conflicts arise from her relationships with the key people in her life. Her adoptive father loves her dearly, but her adoptive mother sees her as an intruder and cannot open her heart to the girl. The mother's resentment deepens after the father dies in an accident for which she blames Joaninha. With her two adoptive brothers, Abel and Arthur, the dynamic is complicated. They love her not just as a sister but are deeply and romantically in love with her as she grows up. This creates a tense and forbidden atmosphere, which their mother tries to control by separating their quarters. Joaninha herself, unaware of the full truth about her adoption and her brothers' true feelings, falls in love with an outsider, a handsome young man who is the grandson of the British Governor.

Joaninha undergoes significant development from a carefree, happy child into a young woman facing profound emotional and social trials. The story traces her evolution from childhood through adolescence and into early adulthood, allowing the viewer to see how her experiences shape her. She begins in a state of blissful ignorance, sheltered from the hatred of her adoptive mother and the obsessed love of her brothers. The discovery of her true parentage and her expulsion from home force her to become more independent and determined. Her journey to London thrusts her into the cruel and aristocratic world of lies and intrigue, where she must navigate social obstacles and heartbreak in her pursuit of her lost love and her own identity.

Joaninha does not possess any supernatural or exceptional abilities. Her notable qualities are her personal strengths. These include her resilience, as she withstands emotional cruelty and social downfall, her innocent charm that attracts the devotion of those around her, and her emotional courage in leaving her homeland to seek her true origins and the man she loves against significant odds.