Okay little scenario cuz I'm waiting for bus so it's kinda short and sorry for my grammar i can't see properly cuz it's dark😭 anyway
Imagine going to the Mondstad with our younger brother Kazuha. And imagine before kazuha was born us(older sister) went with our parents here and while we were here we found a friend that showed us dandalions :D. And we stayed in contact with that friend through letters and stuff, but one day we get a letter that our friend passed away...
So now we are here with kazuha. While we were walking around, we saw a field with dandelions. We were curious so we came closer and picked up dandelion. Then we get flashbacks about your friend....
"Nee-san?"
"Nee-san!"
We came back to reality when he touches our shoulder..
"Ne-sa- are you... crying?"
We touched our eyes and then we realized that we were.... crying?
"Is everything okay?! Are you hurt?!!? What's going on??! Is everything okay?!"
"Oh?...haha...i didn't even notice i was crying. It's alright, don't worry about it Kazu"
Kazuha was really concerned. Everything was okay just couple seconds ago.
He frown to our response.
"Something obviously it's right. Please tell me what's going on [Name]."
We wiped out tears
"Maybe another day, let's enjoy the moment now"
I hope you got home safely, dear anon!
Now- THIS IS SUCH A LOVELY IDEA. I can definitely imagine this happening especially with the penpals prompt.
Imagine MC just going, "I wonder how they'd feel knowing I'm back here after several years..."
That said, what if- what if- what if this friend is a character in Genshin? i'm leaning Diluc/Kaeya or maybe even Thoma for a twist of not knowing he was the best friend all along and they simply forgot each other ladmasidhadhiuwehfae
They all have the perfect reason of suddenly ceasing their letters (Crepus' death / Kaeya and Diluc's broken bond).
But anyway, to shed light on Kazuha, he'd definitely be so worried. MC rarely cries- ever. He'll be more attentive than usual during the stay at Mondstadt~