Zenless Zone Zero x Star Rail Collab Leak: Robin and Kafka Beta Kits

Honkai: Star Rail characters Robin and Kafka are confirmed for the Zenless Zone Zero Version 3.4 collab. Early Version 3.4.1 beta data has revealed their full kits, which remain subject to change before release. Robin arrives as an Ether Defense agent focused on shields and off-field support, while Kafka is an Electric Anomaly agent built around a new bouncing Disorder mechanic.

Robin’s kit centers on Guardian Shields that scale with a percentage of her initial Max HP. These shields stack when reapplied, refresh their duration, and can last up to 60 seconds with a total value capped at 12 percent of her Max HP. Every time a squad member receives a Guardian Shield, their damage dealt increases by 25 percent for 20 seconds.

• Robin can enter an Off-Field Guard state lasting 80 seconds after certain skills. While off-field, she automatically performs Aftershock attacks when the active agent hits an enemy, granting additional shields and building Entry Points for her return.
• Her Ultimate deals massive Ether damage and converts 50 percent of the team’s existing Guardian Shields into HP.
• Off-field, she provides a DEF boost that scales with her HP, reaching up to 800 DEF when her Max HP is high enough. Additional effects boost synergy with Armorer or Stun teammates.

These mechanics position Robin as a dedicated shield buffer who can stay off-field while continuously supporting the squad, especially Armorer teams such as those built around Sunbringer.

Kafka’s kit introduces Electric Arc, a bouncing attack that deals damage equal to a percentage of the original Disorder effect plus a large multiplier of her Anomaly Proficiency. The Arc bounces to up to three nearby enemies, with each bounce dealing 50 percent less damage, and all of its damage counts as Disorder damage.

• Her Core Passive grants +120 Anomaly Proficiency, increases the whole squad’s Disorder damage by 35 percent, and automatically triggers Electric Arc whenever an enemy under an Attribute Anomaly attacks.
• EX Special Attack lets her enter Kafka’s Domain, where she can unleash up to three consecutive slashes or shots that trigger stronger versions of Electric Arc. Her hold Basic Attack can apply Polarity Disorder (90 percent of normal Disorder damage) without removing the existing Attribute Anomaly and can refresh Shock duration.
• With Assist or Anomaly teammates, Shock lasts three seconds longer, and high Energy Regen further boosts her Anomaly Mastery.

Kafka focuses on frequent Disorder triggers and Electric Anomaly application, making her a strong partner for other Anomaly agents. Both kits come from current beta records and may still be adjusted. Version 3.4 is expected around early December 2026 as part of the two-way HSR and ZZZ collab.