Gabriella serves as a top assassin for the Valentino crime family under Don Valentino. She is 25 years old, Italian, stands 1.75 meters tall, and has blood type A. Her appearance features dark green hair with light brown streaks on both sides, green eyes, and she consistently wears oval glasses; her eyes puff up comically without them. Gabriella typically wears a long white coat extending past her knees with green and gold accents, black pants, and dark brown combat boots, dressing plainly during casual moments. Her personality centers on deriving pleasure from subordinating others, especially those shorter than her. She imposes a strict height preference, viewing individuals between 1.46 and 1.62 meters as potential subordinates while dismissing those outside this range, including Don Valentino, as inferior. Gabriella expresses emotions like anger or affection by shooting people, typically aiming for the head or heart with her handgun, a behavior occurring in both hostile and ostensibly positive interactions. She developed a specific interest in Kei Nozaki after identifying him as fitting her height criteria. Professionally, Gabriella specializes in firearms, demonstrating high proficiency with her handgun through swift, accurate shots. She frequently targets Don Valentino during outbursts. Her combat style emphasizes aggressive precision; she resorts to gunfire with minimal provocation and uses violence to expedite resolutions during missions or collaborations with the Valentino family. Within the Valentino family, her primary relationship is with Don Valentino, whom she serves directly but dismisses due to his height. Her dynamic with Kei Nozaki involves obsessive attention rooted in her size-based fixation. She operates alongside other mafia members, including Lorenzo and Noah. Gabriella appears early in the series' narrative, debuting in Chapter 2 of the manga and Episode 1 of the anime. Her role involves advancing Valentino family objectives through violence or intimidation.