Revision 2

Aya is the younger sister of Chigusa Choko and the reason the story happens at all. She travelled to Neo Yokohama with Choko for Choko's film audition. Shortly after the two arrived, Choko was murdered by a group of mysterious men in black, and Aya was taken away by them. She has not been seen since.

The official story copy puts the whole of it in one question: "Who were the men in black who took Aya away?" That question is what sends Choko across the country once she returns from the dead. In the Chapter 3 slice of the build shown at gamescom 2026, the search is explicit: Choko climbs Mount Neo Yokohama specifically to look for Aya, planning to ask an NPC known as Granny Peace about her. Aya also comes up in a story cutscene in that demo build, where Choko thinks of her missing sister during a bathhouse scene.

What Has Not Been Published

As of September 2026, almost everything else. Aya is known by her given name alone; no full name has ever been printed in any first-party material, and the obvious guess is still a guess. Her age, appearance, occupation and personality are unpublished, as is anything about her relationship with Choko beyond the fact that they are sisters. Whether she is alive, where she is being held and who took her were all still open questions as of September 2026, and the demo does not touch them.

No voice actor has been announced for Aya as of September 2026, although the Japanese cast for several other characters was named at gamescom 2026.