Doing a rewatch, and I just like to share my appreciation for how great Cotyar is. The actor, Nick Tarabay seemed to always steal the scenes he was in, even those with Avasarala which seems impossible to do. He was a perfectly played supporting character.
I dont recall this character in the books at all, and I think he was a great addition to the UN/Mars/Errinwright political drama that the TV show focussed so much on.
The Expanse TV series has so many great side characters that make this show so fun to watch.