Lost in Honkai, Acheron Gets Lost Again and Again

I, Acheron, am a Galaxy Ranger. Of course, I can't be sure whether that identity is genuine, but I can confirm that I'm hopelessly directionless. But where am I? Why does this place look just like Izumo?

Mei: If you're me, then who am I?

Kiana: Two Meis means twice the fun!

Elysia: Could I touch your horns?

Durandal: Our first meeting may not have gone smoothly, but we're still the best of comrades.

Rita: Lord Acheron gets lost all the time, and it's quite a headache for Rita.

The story begins when a lost girl meets a dazed goose who has wandered into the Sea of Quanta, then follows Durandal back to the Intrinsic World.

(The author was forced to start a new account and write this because of some signing issues.)