It was another nice day in teyvat,however,you were supposed to meet your little sisters "friend"..You got up all ready to change and go. You were walking around in fontaine(thats where you currently are),aside from furina with neuvilete,navia and the others,you went to the supposed meeting place. as you waited for your little sister....you suddenly saw them!

Paimon:Sis/Brother!!~she said in the teasing tone she always had..

Aether:..Huh?Seemed like the traveler was a bit confused..paimon never mentioned to him that she had a older sibling before.