Based on the mention of "Eridu's Defense Force, Chrysoberyl Division – Lyre Squad" in the video archive "Out of Sight", from Zenless Zone Zero, by MiHoYo/HoYoverse/Cognosphere PTE. LTD.

Meet Lyre Squad — a loud and lively yet somewhat professional military division with rather... unique personalities, going from the lazy Cocytus, to the fashionable Acheron and the very irritable captain, Charon. While they may argue or differ sometimes, they all share the same goal – protect Eridu from Hollows.