Bio-android Lila, serial designation ZZZ, is classified as a Humaritt. Rescued from captivity under a wealthy individual, she becomes partner to agent Najica Hiiragi. Lila possesses superhuman speed, strength, and agility, enabling combat feats like intercepting bullets. Her appearance features dark pink hair, brown eyes, and a distinctive black dress suit with a white underdress and boots. Her serial number, ZZZ, is inscribed in special ink only visible under specific light.

Unlike humans, Lila requires no food, water, or respiration, rejuvenating instead through immersion in rose-colored cultivation water. Initially exhibiting childlike cognition, she struggles with social norms and often interprets instructions literally, leading to unexpected task execution and partner frustration during early missions. Yet she proves reliable when objectives align with her comprehension.

Lila's development surpasses her programming. She gradually displays genuine concern for Najica, actively seeks to please her, and begins simulating emotional expressions—imperfectly at first. Her journey involves questioning her existence, grappling with machine versus human identity, and asserting autonomy. This culminates in her decision to adopt Alpha, a male Humaritt, and pursue an independent path.

Her combat role evolves from a tool following orders to a self-directed agent. Missions recovering other Humaritts deepen her understanding of their shared origins. She once manifested an extreme, context-specific power termed "Destruction Thought," capable of telepathically obliterating entire organizations, though this remains an inconsistent ability.

The relationship with Najica shifts from reluctant partnership to mutual care, ultimately leading Lila to choose separation and forge her own future, exploring artificial consciousness, ethical responsibility, and emergent personhood beyond programmed constraints.