Shi Fen occupies the role of an older sibling in a volatile but fiercely interdependent relationship with his younger sister. Both attend the same school, where his initial portrayal as a first-year high school student highlights a mischievous streak—teasing, scheming, and provoking conflicts that often culminate in his sister’s physical retaliation. A later adjustment to fourth-year middle school student subtly marks the passage of narrative time.

Following their parents’ divorce, the siblings share a home, their coexistence oscillating between friction and mutual reliance. Though prone to reckless antics and ill-considered choices, Shi Fen reveals an instinctive protectiveness in critical moments, prioritizing his sister’s safety over his own impulsivity. This duality—carefree troublemaker juxtaposed with urgent caretaker—anchors his complexity.

His closest bonds include Zhen Kaixin, a basketball teammate and partner-in-mischief, and Wan Sui, a transfer student discreetly masking his affluent background. Together, they navigate collaborative escapades, with Shi Fen’s loyalty persisting even as his antics test their patience. Basketball, food, and attention-seeking theatrics dominate his interests, often expressed through boisterous humor or exaggerated stunts.

Occasionally dubbed “Minuto” by peers—a nickname of unexplained origin—he thrives as an agent of chaos within his social circle. Yet his disruptions frequently mask attempts to uplift or assist others, channeling an unpolished but sincere intent. While his long-term growth remains unexplored, his persona persists as a blend of stubborn immaturity, tenacity, and fledgling responsibility, tempered by the demands of fractured family life.