Bangboo are rabbit-like robotic assistants used by Proxies in Zenless Zone Zero to explore Hollows and support Agents in combat against Ethereals. They provide various abilities like damage, energy regeneration, healing, and anomaly buildup, with different ranks and types such as Amillion, Safety, Sharkboo, Butler, Snap, and Miss Esme. Specific Bangboos like Brawlerboo deal Fire DMG, Electroboo deals Electric DMG, and Bagboo performs Physical slashes. They activate skills based on team compositions, e.g., Officer Cui with Criminal Investigation teams or Red Moccus with Sons of Calydon. Players obtain them via Signal Search Gacha using Boopons.