HoYoverse is finally letting its two flagship gacha games trade characters. A crossover between Honkai: Star Rail and Zenless Zone Zero is officially happening, and unlike past HoYoverse team-ups, this one runs both directions. The catch is timing. The studio has committed to a season, not a calendar date.
Quick answer: The HSR x ZZZ collab is confirmed for Winter 2026. No exact date has been announced, but leaks point to a December 2026 launch tied to Honkai: Star Rail Version 4.8. Treat any specific day as unconfirmed until HoYoverse posts it.
Release status: confirmed window, no fixed date
Here is where things actually stand. The crossover itself and the Winter 2026 window are official. Everything sharper than that, including the day, the version, and which characters cross over, is still rumor.
| Detail | Status |
|---|---|
| Crossover happening | Confirmed |
| Release window | Winter 2026 |
| Likely period | December 2026 (may slip into early 2027) |
| Rumored HSR version | Version 4.8 |
| Exact date and time | Not announced |
Winter 2026 is a wide bucket. Because HoYoverse hasn’t defined the exact period, the event could land in December or spill into the start of 2027. Star Rail’s usual update cadence lines up with a late-December slot, which is why most expectations cluster around Version 4.8.
It’s a two-way crossover
This is the part worth understanding before you pick a side. The earlier Honkai Impact 3rd tie-in only fed content into one game. This time both titles get something. Zenless Zone Zero receives Honkai: Star Rail material, and Honkai: Star Rail receives Zenless Zone Zero material.
So if you play either game, the event touches your roster. HoYoverse has described it as a crossover event rather than a simple promo, which leaves room for playable characters, event stages, cosmetics, and story content. The exact package hasn’t been detailed yet.
Leaked crossover characters
No characters are officially confirmed. The lineup below comes from leaks and should be treated as unverified until HoYoverse says otherwise. That said, the same three names keep surfacing.
| Character | Home game | Crossing into | Rumored role |
|---|---|---|---|
| Robin | Honkai: Star Rail | Zenless Zone Zero | Support agent |
| Astra Yao | Zenless Zone Zero | Honkai: Star Rail | Quantum universal support (Harmony/Abundance) |
| Ellen Joe | Zenless Zone Zero | Honkai: Star Rail | Ice Destruction DPS |
Robin and Astra Yao pairing up makes sense on paper, since both are famous singers in their own worlds. That thematic fit points to a music- or concert-style event. Ellen Joe is the odd one out, but she’s one of ZZZ’s most recognizable agents, so her inclusion tracks. Leaks also suggest Ellen Joe could be handed out for free to all Star Rail players, while Astra Yao would sit on a limited banner. None of that is locked.
Note: an earlier rumor about a different ZZZ unit heading to Star Rail was later walked back and labeled false. Only the three names above have kept circulating.
Pom-Pom in Zenless Zone Zero was the first hint
Before any announcement, players found Pom-Pom, the Astral Express conductor from Honkai: Star Rail, wandering around Zenless Zone Zero on live servers. This wasn’t a beta or a mod. The mascot showed up in the real game.
You can run into Pom-Pom in a few spots around Sixth Street. It hangs around the Random Play Video Store, including near the videotape display and outside the shop, and it can be found tidying the parking lot behind the store. What first read like a small Easter egg turned out to be the tease for this crossover.
How to prepare before Winter 2026
Since the leaked characters are expected on limited banners, the safe move is to bank premium currency now. There’s a lot of runway before winter, so you can build a comfortable pull count without spending.
- In Honkai: Star Rail, hold your Stellar Jades if you want Astra Yao when the collab banner arrives.
- In Zenless Zone Zero, save Polychromes in case Robin lands on a limited Signal Search banner.
- If the Ellen Joe free giveaway holds true, you may not need to pull for her at all, so weight your savings toward the paid banners.
The safest read right now is simple. The collab is real and pointed at Winter 2026, the crossover flows both ways, and the character list is still leak-driven. Once HoYoverse posts a firm date, version, and banner schedule, those blanks fill in, and until then any exact day floating around is speculation.
