Gina is the owner and operator of the Hotel Adriano, an upscale establishment that serves as a neutral haven for pilots, bounty hunters, and air pirates traversing the Adriatic Sea during the interwar period. She is a woman of great beauty and poise, known throughout the aviation community for her captivating singing voice, which draws visitors to her hotel's cabaret. Her personal history is deeply intertwined with the world of flying boats. In her youth, she was a member of a Flying Club, a group of friends who shared a passion for flight. Among this group was Marco Pagot, a talented pilot who would later become known as the bounty hunter Porco Rosso.

Gina's personal life has been marked by profound loss and a stoic endurance of tragedy. She has been married three times, and all three of her husbands were members of that same Flying Club. Each of them died in flying accidents: her first husband was lost during a patrol in World War I, the second crashed in the Pacific Ocean, and the third died in Bengal. By the time of the story, she has become emotionally resigned, having shed all her tears and accepting the grief as an inescapable part of her life. Despite or perhaps because of this tragic history, she remains a figure of deep respect and admiration. Even the unruly air pirates treat her establishment as sacred ground, maintaining an unspoken truce on her property out of deference to her.

The central relationship in Gina's life is her enduring connection with Porco Rosso. He is the last surviving member of their childhood Flying Club, and she has been waiting for him for a long time, hoping he will end his solitary life as a pig and return to her. Their bond is one of deep, unspoken affection and shared history, marked by a sense of melancholic familiarity. She is one of the few people who knows his true name, Marco, and she uses it deliberately, a stark contrast to his public identity as a pig. She worries constantly about his dangerous profession as a bounty hunter, and after he is shot down, her fear and frustration are evident when she speaks to him on the telephone. Her deep-seated wish is for his safety and a life with her, which culminates in a private bet she makes with herself: if Porco lands his plane in her garden during the daytime, she will finally marry him. His characteristic answer to this unstated proposal is to perform aerial acrobatics over her garden, acknowledging her feelings without ending his flight, a gesture she understands perfectly and calls him a fool for.

Gina serves a crucial narrative role as the emotional anchor and a symbol of a lost, more innocent past for the protagonist. While Porco isolates himself and broods over his guilt and the rise of fascism, Gina is outwardly composed, maintaining a glamorous public persona while carrying a private sorrow. She represents the life on the ground that he has abandoned and the human connection he is too ashamed to pursue. Her own abilities are notable: she is a savvy businesswoman who runs a successful and respected establishment, a gifted singer whose voice has a calming effect on all who hear it, and, as revealed in a brief flashback, she was a passenger in Porco's plane in her youth, indicating a personal comfort with and love for flying. Her character development is subtle, as she moves from a position of passive, sorrowful waiting to active hope, finally seeing a sign from Porco that her long vigil may soon be over, suggesting that her patience has finally altered the course of her long and complicated relationship with the world's most famous pig pilot.