Honkai: Star Rail Version 4.5, titled “To Roll the Stars in Astropolis,” launches on August 26 and introduces the new destination Astropolis along with two new 5-star characters: Robin • Summeretto and Aventurine • Waveflair.

Phase 1 of the Light Cone Warp Event features the 5-star Remembrance ‘Rise and Sing’ for Robin Summeretto, the 5-star Remembrance ‘Long May Rainbows Adorn the Sky’ for Hyacine, and 4-star options including ‘A Little Getaway,’ ‘Dream’s Montage,’ and ‘Geniuses’ Greetings.’

Robin • Summeretto buffs teammates via Vibes, activates Fever Pitch, regenerates energy on Ultimate, and debuts a new single ‘Only by Chasing the Wind’ with the release.

Redeem codes in-game via Menu > Redemption Code or online at hs r.hoyoverse.com/gift, requiring correct server, Hoyoverse account login, and a valid UID.

In-game redemption is available via the Redemption Code option, or on the official site by logging into a HoYoverse account, selecting server, and entering codes; iOS users are advised to redeem via the website as in-game redemption may not appear on iOS.

A Zenless Zone Zero collaboration is planned later in 2026, with no further details yet.

The update centers on the Trailblazer departing Planarcadia for Astropolis to seek aid amid political tensions and a crisis sparked by the Voracity.

The narrative follows the Trailblazer’s mission in Astropolis, with Robin and Aventurine investigating, including a potential traitor among the Ten Stonehearts.

The Trailblazer departs Planarcadia for Astropolis to secure support as interstellar power dynamics unfold within the IPC and its leadership.

Official details and updates are available on HoYoverse’s site and social channels.

Version 4.5 maintains the six-week patch cadence, with livestreams and dates signaling stable release timing.

Version 4.5 events are designed to fill the six-week patch window as the narrative progresses toward future content beyond 4.5.