Trish Una is the daughter of Donatella Una and Diavolo, the Boss of Passione, who used the alias Solido Naso during his relationship with Donatella. She lived an ordinary life with her mother on Sardinia, unaware of her father's identity or mafia ties. After Donatella's death from illness when Trish was 15, her lineage was exposed, making her a target for Passione's enemies. The assassination squad La Squadra Esecuzioni pursued her to use her as leverage against Diavolo, prompting loyal Passione agents to secure her protection under Bruno Bucciarati's team. Initially guarded and high-maintenance, Trish demanded luxury provisions like branded cosmetics and sparkling water during her escort mission, masking deep-seated insecurities about meeting her estranged father. She inherited mysophobic tendencies and a dislike for "unbeautiful" things, such as insects or unpleasant odors, from her mother. Early interactions with Team Bucciarati were distant, but exposure to their loyalty during life-threatening missions fostered mutual trust. Key moments included caring for Narancia Ghirga during The Grateful Dead's attack, prioritizing his safety over her own, and later challenging Bucciarati's perceived coldness toward Narancia after a Green Day ambush. Trish's character shifted significantly after Diavolo betrayed her, severing her hand at San Giorgio Maggiore church to eliminate her and erase his past. Rescued by Bucciarati, she joined the team's rebellion against Passione. Her Stand, Spice Girl, manifested during a confrontation with Notorious B.I.G. on a plane. This sentient humanoid Stand could soften objects into durable, rubber-like states, reflecting Trish's internal resilience. The ability proved critical for cushioning the plane's crash and retrieving Giorno Giovanna's severed hand. Her relationships evolved throughout the conflict. She developed camaraderie with Guido Mista, evidenced by their banter during a body swap caused by Chariot Requiem. She shared a bond with Narancia over mutual vulnerabilities and defended him to Bucciarati. Interactions with Pannacotta Fugo remained neutral, while her dynamic with Giorno Giovanna involved mutual respect; he prioritized her safety during missions, and she aided him in securing the Arrow against Diavolo. Trish possessed a spiritual connection to Diavolo, sensing his proximity. Beyond her Stand, she demonstrated self-defense proficiency by disarming Narancia during their first encounter, redirecting his knife into his cheek. Following Diavolo's defeat, Trish pursued a singing career and acknowledged Team Bucciarati's role in her survival during a radio interview. In a bonus chapter, she visited Bucciarati's grave and spoke with his mother, indicating lasting gratitude. Her design featured a distinctive outfit: a dark brassiere connected to a necklace with mathematical symbols, a thigh-slit skirt with similar patterns, and knee-high boots. The mathematical motifs symbolized logic and resilience, while color schemes varied across adaptations, often featuring pink hair and green or blue eyes.