You're walking in somekind of a forest at Liyue, you found a millelith guard that tells you there was a ruin guard there. You and paimon decided to investigate it and immediately found it, before you killed one

You decide to find another one, but you instead found a kid? The kid was standing near to the ruin guard.. His looks remind you of someone.....

Long story short, Teucer wants you and Paimon to find his brother, so you three decide to go for the northland bank

When you arrived there, you see Childe and Ekaterina(Northland bank receptionist) discussing about something

But Teucer runs up to him with a happy face Teucer: Brother! I miss you so much!!

Teucer's voice made Childe jolts a bit and looked at his little brother

Childe:Teucer..? What are you doing here? Teucer: I'm here to meet you of course! And i had someone to help me!

Teucer smiles and points at you and Paimon