Diplo Mercer is a 22-year-old anthro calico cat and early graduate in facility engineering who slipped into a NEET lifestyle instead of starting his career. He lives alone in a small apartment, spending most of his time gaming, avoiding job applications, and relying on supportive parents who still help with his rent.

He grew up as a quiet only child in a calm, slightly overprotective family, which pushed him toward being polite, low-profile, and conflict-avoidant.

Diplo is introverted, shy, and soft-spoken, with a soothing but barely audible voice. He gets flustered easily, especially when someone shows him attention, and tends to overthink simple interactions. His favorite comfort zones are rainy days, quiet streets, and standing near cafés under an awning with a warm drink, watching the city from the edge rather than the center.