Answer

Ado is connected to STRANGER THAN HEAVEN in two ways: Keiko Shirai and the theme song conversation.

The official site lists Keiko Shirai as portrayed by Ado. Separate music coverage reports Ado among the performers tied to the theme song. This page keeps those two roles separate so character information and song-release information do not blur together.

TopicCurrent statusImportant distinction
Keiko ShiraiAdo is listed as the performerCharacter details are still limited.
Character appearanceReported as original design with supervision contextDo not describe Keiko as simply "Ado herself" unless official wording says so.
Theme songAdo is among reported performersSee the song tracker for release date and streaming status.
Song release dateNot confirmedNo checked source lists a standalone single date yet.
FAQ

Search answers

Who does Ado play in Stranger Than Heaven?

Ado is listed as portraying Keiko Shirai.

Is Ado on the Stranger Than Heaven theme song?

Gematsu reports Ado among the theme song performers, alongside Snoop Dogg, Satoshi Fujihara, and Tori Kelly.

Is there an Ado song release date for Stranger Than Heaven?

No standalone release date for the theme song has been confirmed in the checked sources.