The information here comes from a post made by the official account on Hoyolab on 8 March 2026.

The Express crew arrives at Planarcadia, only to get swept up in the “Phantasmoon Games,” a quest to gain an audience with an Aeon.
Yao Guang helps Sunday become a Supplicant. The Trailblazer defeats Sparxie at SparxiCon.
The dangerous mists of doubt hidden beneath the arcadia begin to surface.

Current Known Supplicants: 3/8

Starting Lineup Ready

Sparxie: (Called and Out)
I shall make every audience member become me, offering up the Elation that people desire to the arcadia.

Trailblazer: (Called)
The reason I joined the game will be revealed the moment I become the Aeon of Elation.

Sunday: (Not Yet Called)
I want to see with my own eyes whether this “arcadia” lives up to its name.

Yao Guang: (Assisted Sunday in Entry)
I will invite Aha into my calculations… to draw a Great Weal for the cosmos's future!

*Player Candidacy in Progress