Billy, an A-Rank Physical Agent in Zenless Zone Zero, serves as the primary Attack Agent capable of acting as the main DPS in any team composition. Armed with dual pistols, Billy unleashes rapid hellfire on the battlefield. He belongs to the Cunning Hares faction alongside Nicole, Anby, and Nekomata.
While Billy is initially available for free, he remains a solid choice throughout the early to mid-game stages. Therefore, investing in his promotion and skill upgrades is highly beneficial. This guide outlines all the necessary materials for promoting and enhancing Billy in Zenless Zone Zero.
Zenless Zone Zero Billy Promotion Materials
Promoting Billy to the maximum rank requires the following materials:
- Basic Offense Certification Seal x4
- Advanced Offense Certification Seal x32
- Pioneer’s Certification Seal x30
- Dennies x800,000
Zenless Zone Zero Billy Skill Materials
Upgrading Billy’s five skills to their maximum levels requires the following materials:
- Basic Physical Chips x25
- Advanced Physical Chips x15
- Specialized Physical Chips x50
- Dennies x500,000
- Hamster Cage Pass x5
Zenless Zone Zero Billy Core Skills Unlock
Billy’s core skills can be unlocked and enhanced with the following materials:
- A – Dennies x5,000
- B – Ferocious Grip x2, Dennies x12,000
- C – Ferocious Grip x4, Dennies x28,000
- D – Ferocious Grip x2, Ethereal Pursuit x9, Dennies x60,000
- E – Ferocious Grip x3, Ethereal Pursuit x15, Dennies x100,000
- F – Ferocious Grip x4, Ethereal Pursuit x30, Dennies x200,000
Zenless Zone Zero Billy Materials Farming Locations
To farm Billy’s materials in Zenless Zone Zero, progress through the game to access repeatable combat challenges. Here are the farming locations for each type of material:
- Basic/Advanced Offense Seals and Pioneer’s Certification Seal: Complete the Attack Drill challenge in the HIA VR Center.
- Physical Chips: Complete the Rigidity Test in the HIA VR Center.
- Hamster Cage Pass: Obtain during limited-time events or progress through the New Eridu City Fund Battle Pass.
- Higher Dimensional Data: Ethereal Pursuit: Complete the Expert Challenge “Notorious – Armored Hati” in the HIA Club.
- Ferocious Grip: Defeat the “Newborn Dead End Butcher” in the Scott Outpost Notorious Hunt.
By participating in these challenges and events, you can efficiently gather the materials needed to promote and enhance Billy in Zenless Zone Zero.