More castings have been announced since the last post
https://dragonmount.com/tv/s1/cast/
Clare Perkins as Kerene Nagashi
Peter Franzen Unspecified role
Kate Fleetwood as Liandrin
Maria Doyle Kennedy Unspecified role
Jennifer Cheon Garcia as Leane Sharif
And some more. Can't say I really know much of the cast that have been confirmed so far. And the only actor I know that I've seen consistently was Daniel Henney in Hawii Five-O. I was hoping that they'd get a bigger cast for Liandrin, since she's probably one of the more pivotal secondary characters on the bad guy side of the story. But I can't say I've seen much of Kate Fleetwood's work to say whether she will make a good villain.