The information here comes from a post made by the official account on Hoyolab on 27 January 2024.

We're about to arrive at Penacony, the Planet of Festivities!
The road is long, so let Pom-Pom give everyone an overview on the backgrounds of the guests attending the festivities. Time to do some necessary research!
You might not know enough about the IPC and Intelligentsia Guild right now…