Sunna, a new S-rank agent, arrives in Zenless Zone Zero on February 6, 2026, as part of version 2.6. The character belongs to the Angels of Delusion faction and will be available through a dedicated banner called "Whimsy in Triple Meter" during phase one of the update.
Quick answer: Sunna's banner runs from February 6 to March 4, 2026, across all servers.
Release time: February 6, 2026 at 10:00 PM ET (February 6 at 4:00 AM CET / 11:00 AM JST)

Banner schedule and featured characters
Sunna's banner runs for 27 days, from February 6 through March 4, 2026. The character will be the exclusive S-rank feature during this window, meaning she has a 50 percent chance to appear on your first S-rank pull. If you pull a different S-rank character first, your next guaranteed S-rank will be Sunna.
Two A-rank characters receive rate-ups alongside Sunna: Corin and Billy, both physical-attack specialists. The banner also includes all standard S-rank characters from the permanent pool, so you could receive Nekomata, Lycaon, Soldier 11, Koleda, Grace, or Rina instead of the featured character.
Sunna's banner runs parallel to Yixuan's rerun banner, which offers the same A-rank rate-ups but features Yixuan as the guaranteed S-rank pull instead. Both banners end on different dates—Sunna's on March 4 and Yixuan's on March 3—so plan your pulls accordingly if you want either character.

Server-specific release times
Version 2.6 launches at different times depending on your region. Maintenance begins several hours before the official release to prepare servers for the update.
| Region | Release Time | Maintenance Ends |
|---|---|---|
| America (ET) | February 5, 10:00 PM | February 5, 10:00 PM |
| Europe (CET) | February 6, 4:00 AM | February 6, 4:00 AM |
| Asia (JST) | February 6, 12:00 PM | February 6, 12:00 PM |
Maintenance typically lasts about five hours. During this window, servers will be offline, and you won't be able to log in. Plan your playtime accordingly if you want to pull immediately after release.
What's included in version 2.6
Beyond Sunna's debut, version 2.6 introduces a new story chapter titled "Encore for an Old Dream," which becomes permanently available after the update. This interlude expands the main narrative and provides context for the Angels of Delusion faction.
Two new W-Engines (weapons) debut alongside Sunna: Thoughtbop, a physical-damage support weapon, and Angel in the Shell, an anomaly-focused engine. Both are S-rank and will appear in dedicated W-Engine banners running concurrently with the character banners.
Phase two of version 2.6, launching later in the cycle, will feature Aria, another Angels of Delusion member, alongside Yuzuha's rerun banner. This gives you multiple opportunities to pull for different members of the new faction.

How to prepare for Sunna's release
If you're planning to pull for Sunna, start saving Polychromes (the premium currency) now. You'll need 90 pulls to guarantee an S-rank character if you don't already have a guaranteed ready, or just 50 if your pity counter is active. Check your banner history in-game to see where you stand on the current pity system.
Sunna's A-rank rate-ups—Corin and Billy—are both useful physical-attack agents, so even if you don't land the featured S-rank, you'll have a reasonable chance of getting a strong support character. Both have been available in previous banners, so you may already own them.
The update will go live automatically once maintenance is complete. You don't need to download anything manually; the patch applies when you log in after the maintenance window ends.