Moeko Fujima attends Shukusei Music Academy as a Japanese student. She stands 1.55 meters tall with auburn hair, green eyes, and olive skin—a detail that factors into her targeting. Her body measurements are 81 cm (bust), 58 cm (waist), and 87 cm (hips). Her father, a real estate agent, accumulated wealth during Japan's economic bubble, enabling substantial financial donations to the academy. These donations bind her to the institution despite her personal dissatisfaction.

Rebellious and dismissive, Moeko addresses the academy handyman Shuusaku with the informal "Ojii-san". She smokes cigarettes and routinely violates dormitory curfew to meet her boyfriend. This pattern of rule-breaking and her established sexual activity shape her characterization. Her enrollment stems solely from her family's financial influence and physical appearance, not musical talent or lineage.

Moeko becomes a specific target for exploitation, suffering forced sexual acts as part of Shuusaku's calculated blackmail campaign. This occurs prominently during "The Second Night", where she is singled out following an assault on another character. Her victimization reflects a broader pattern of predation within the academy's dormitory setting.