Curate, connect, and discover
Random thought but I was reading some fan fiction, as one does and there was the word Muppet in it. So know I am thinking out of all the shadow and bone characters who would be the one human. Nikolai would be a solid vibe, but Zoya, the Darkling or Mal would be way too funny.
With six of crows Kaz has to be the one human there is no other option. The only one you can argue for is Matthias but what Muppet could play Kaz. You know what I mean.
But also after you decide the only human who would be played by what Muppet? I should definitely watch more Muppets content