Cassia the Navigator (capital N) from the new 40k Rogue Trader computer game.
Main prompt is "CassiaRT". For her game outfit "long dress" and "armor" are recommended.
For her proper appearance, combinations of "colored skin,white hair,red eyes,gem,circlet,jewelry". They're baked in, but the model likes nudging a lot better.
The forehead jewel is an essential part of her because it shields her deadly warp-eye.