Who are the characters depicted in the cover of Dragon Heist? 

[![enter image description here](https://i.stack.imgur.com/4boun.jpg)](https://i.stack.imgur.com/4boun.jpg)

I've just started DMing this, and I'm reading through the 1st chapter, but I don't recognize the characters here. The beholder in the background looks like Xanathar. None look like Volo or his missing cousin Floon.