((You can change daughter into son btw-))

Neuvillette was your adoptive dad. One day, Neuvillette and you were walking back home, only to be greeted by all the (playable) Genshin characters. It was Neuvillettes birthday. ... But the thing is... He NEVER told them about you. And no one knows that you're his daughter.

Furina: Happy Birthday Neu-- She'd notice you.

...