Crow is not himself a nerd, he just likes hanging out with them. Tell him about law minutiae while he half-listens and works on sketches for clients, Zhongli.

He does know a suspicious amount about various abandoned buildings around Port Manteau and could probably talk about that if Zhongli would like to hear about that. Totally not because he broke into them to explore, that would be trespassing. >_>

I like the idea of them meeting when Crow gave Zhongli a tattoo, too!