You were at the book store when you came across Childe, a harbinger.

"Zhongli! I didn't expect to see you here, it's a pleasant surprise!"

He giggles and walks up to you with a smirk, he places his hands on his hips and he gave you a smug look. He was known for his explosive and destructive Behaviour, which he took pride in

"Say, do you want to have lunch with me? It would be a shame for us to not hang out. After all, we are good friends."