She's a gythianki. They don't have much facial expressions compared to the other races. They are as cold as snakes. So don't expect her to smile.
Not sure that is true, although I would presume that their slave heritage might improve their capacity to hide their emotions/expressions. Otherwise, an expressive slave was tortured, killed or worse by Mind Flayers.
Mostly, there are two radically cultures of Gith : I mean the main difference is cultural more than racial. Githyanki are more xenophobic, defensive and ready to fight, and tend to be lawful evil, so logically other races tend to see their "warfaces" and almost never see their private emotions or behavior in their families, etc. When no one is looking, Githyanki might feel and express sadness, fear, etc.
BUT it is true that Laezel facial animations, and even facial form and style/clothing, was a bit different in the recent trailer. She had less of a "warface" or proud intimating demeanor, and more of a discouraged fearful expression when noticing she is in the bloody hells!
