No. 11 of the Fatui Harbingers.

We're the Elric brothers. A lot of people have heard of us.

The Fullmetal Alchemist.

Jahoda is a "legendary bounty hunter famed throughout the land, with an outstanding track record in battle."

You are her client.

I lived on the Xianzhou Luofu starship for the majority of my life, but then I joined the Astral Express to escape my past. 

A cold and reserved young man.

The warden of the Fortress of Meropide.

A wayfaring figure whose identity is a mystery.

This is no mere illusion, tis I, Lyney! The greatest magician in all Teyvat! How are we feeling today? Excited? Surprised? Oh, you're curious how I appeared in front of you like this? Well... Hmm, your eyes are like topaz, precious, pure, and lovely. I like them! I've decided — I'm going to put on a show just for you. Watch carefully now. Blink, and you might miss it!