Nero Yuzurizaki, a 15-year-old tomboy with auburn hair and sharp green eyes, habitually refers to herself using the masculine pronoun *boku*, her speech as brash as her assertive demeanor. Standing 152 cm tall and weighing 42 kg, she boasts a ravenous appetite and a fiercely self-centered streak, though her loyalty surfaces when protecting teammates, even if she employs sly tactics to secure victories. Her supernatural "Toy" manifests as a small metal object, channeling her ability to manipulate machinery—disassembling, rebuilding, or enhancing devices using nearby materials, though the limits of this power remain ambiguous.

Nero’s battles against foes like the Thieves’ Empire often strip her and her allies of their Toys, as seen when a lightning strike mid-conflict severed their supernatural link, compelling her to rely on raw ingenuity and teamwork. Amidst these trials, her unspoken crush on teammate Hercule Barton complicates interactions, blending subtle vulnerability with her abrasive exterior.

The surname Yuzurizaki, derived from characters meaning "transfer" and "cape," hints at her role as a pivot in her team’s strategies. While her backstory remains sparse, her narrative arcs emphasize grit in adversity, tactical adaptability, and incremental growth through collaboration, cementing her as a flawed yet tenacious force within the group’s dynamic.