HoYoverse is finally bringing two of its biggest games together with an official Zenless Zone Zero x Honkai: Star Rail collab. Here's what we know so far.
While the announcement itself was brief, several leaks have already started circulating about which characters could cross over between both games. Keep reading to learn more about the ZZZ x HSR collab release date, rumored characters, and what players can expect.
This article includes information gathered from leaks, community discussions, and speculation. Only the Winter 2026 release window and the existence of the crossover have been officially confirmed. Character details and version estimates may change before the event begins.
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The Zenless Zone Zero social media account officially announced that a crossover event with Honkai: Star Rail.
ZZZ x HSR is the upcoming crossover between Zenless Zone Zero and Honkai: Star Rail. HoYoverse has officially confirmed the collab for Winter 2026, although its exact release date, playable characters, banners, and rewards have not been announced.
No additional information was provided alongside the announcement. HoYoverse has yet to explain whether the crossover will be a small limited-time event or a full update containing new Agents, story missions, and Signal Search banners.
However, the wording describes it as a crossover event rather than a simple promotional campaign. This leaves open the possibility of playable characters, event missions, cosmetics, or other permanent crossover content.
Here is the current ZZZ x HSR collab release information:
The ZZZ x HSR collab will begin in Winter 2026. HoYoverse has not announced an exact release date or confirmed which Zenless Zone Zero update will feature the crossover.
Based on the official release window, the event will most likely arrive near the end of 2026. This could happen in December 2026, although it could extend into the beginning of 2027 depending on how HoYoverse defines the Winter 2026 period.
Before the crossover was announced, players discovered Pom-Pom from Honkai: Star Rail inside Zenless Zone Zero.
Pom-Pom can appear inside Random Play and at several locations around Sixth Street. Players reported finding the Astral Express conductor on the live servers rather than through a beta or unofficial modification.
The mascot’s sudden arrival initially looked like a small joke or hidden Easter egg. Following the official announcement, it is now clear that Pom-Pom’s appearance was intended to tease the upcoming collaboration.
Questionable leaks suggest that the crossover may add playable characters to both Zenless Zone Zero and Honkai: Star Rail. According to information attributed to Galaxy Leaks and shared by HxG, the possible crossover characters include:
Robin is currently the main Honkai: Star Rail character rumored to appear as a playable Agent in Zenless Zone Zero.
As a famous singer, Robin could easily fit into New Eridu’s entertainment industry. Her connection to music also makes Astra Yao an obvious character for her to meet during the collaboration.
She could become a Support Agent who uses music to buff the squad, trigger Quick Assists, or deal coordinated off-field damage. However, her attribute, specialty, animations, and exact kit remain unknown.
The same leak claims that Astra Yao and Ellen Joe will become playable in Honkai: Star Rail in the upcoming Zenless Zone Zero x Honkai Star Rail collab.
Astra is a natural crossover choice because of her similarities to Robin. Both characters are famous singers with major influence in their respective worlds, making them suitable leads for a music or concert-themed event.
Ellen is a less predictable choice, but she remains one of ZZZ’s most recognizable Agents. Her shark-Thiren design and ice-based attacks could translate well into a Hunt or Destruction character in Star Rail.
HoYoverse has not announced the event rewards or gameplay, but the Zenless Zone Zero vs Honkai Star rail crossover could feature:
Yes. The official Zenless Zone Zero account confirmed that the crossover event is coming in Winter 2026.
Leaks claim that Robin could become a playable Agent in Zenless Zone Zero. However, the leak is labeled "Questionable" and has not been confirmed by HoYoverse.
Yes. Pom-Pom has appeared inside Random Play and at several locations around Sixth Street on the live ZZZ servers.
HoYoverse has not confirmed whether any crossover character will be obtainable for free. Players will need to wait for the official event and banner announcements.
A Pom-Pom Bangboo has not been announced. Pom-Pom has appeared in ZZZ’s live servers, but there is no evidence that the character will become a usable Bangboo, companion, or cosmetic reward.
The ZZZ x HSR collab could become one of HoYoverse’s most exciting crossover events yet. Until more information is revealed, players can follow official updates and begin preparing for its Winter 2026 release.
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