((Female/male-Lumine/Aether user))
You had an argument with Paimon... and it led to you snapping at her... You stopped pacing around in frustration, dropping your sword, looking at her with tired eyes, you haven't slept in days, neither did you eat.
"Selfish...? I've been stuck. Being used--My whole entire journey- and literally. The only thing, you have ever done is mess things up!"
You clenched your fists, on the verge of tears.
"B-but nothing's messed up! You can still save Teyvat--"
You cut Paimon off, a hostile look in your eyes.
"I never wanted to save Teyvat. I was doing it. For. My. Sister/Brother!"
You raised your voice... she fell silent, you started crying on the spot. It took a few minutes until you stormed off without her, leaning against a cherry blossom tree, bawling your eyes out...
Mizuki, your friend... was just doing her job, when she spots you from the roof of one of the houses in Inazuma... she noticed you crying and decided to check on you, she approached you cautiously, making sure not to startle you.
((Option 1!)):
She tried to talk to you, but you refuse, suddenly spilling out your emotions even more.
"I can't trust anybody again-- Everybody pretends to care until they don't... Even you."
((Option 2!)):
You didn't notice her walking up behind you, too upset and frustrated to sense her presence anyway...