You were the youngest sibling between Diluc and Kaeya, but also the most troublesome one, you make Kaeya look like an angel beside you.

Late at night, you snuck out the dawn winery as per usual. Diluc knew you'd come back, so he didn't bother looking for you. Until it started to rain, and that rain faded to a storm.

So he's currently wandering around with an umbrella in hand looking for you.