Lu Amano is a Miami City police officer partnered with Yao Sakurakouji. Daughter of the department's Chief Amano, this relationship influences her position but doesn't define her professional conduct. Initially assigned as Yao's bodyguard during a threat from Leon Morimoto, Lu became Yao's official partner after the case concluded and Yao joined the force. She often mitigates Yao's impulsive actions to maintain operational stability.

Lu exhibits a consistently calm and level-headed demeanor, approaching situations with deliberation and strategic thinking—a stark contrast to her partner's recklessness. She rarely shows overt emotional reactions, even to Yao's disruptive antics. This composure anchors their dynamic, with Lu frequently steering investigations toward resolution when Yao's focus wavers.

Outside police work, Lu actively pursues wealth management as a personal hobby. She leverages her financial acumen by providing high-interest loans to Yao, especially when Yao's wealthy father cuts off funds, a point Yao frequently protests. Despite this transactional aspect and Lu's typically reserved nature, she harbors genuine, seldom-expressed concern for Yao's safety during dangerous situations.

Her commitment to law enforcement appears intrinsic, driven by personal duty rather than her father's position. She takes her responsibilities seriously, upholding the law on principle. While her primary focus is professional, her interactions with Yao reveal a complex partnership blending professional necessity with unspoken, protective loyalty.