Delian Mors was the Imperial Moff of the planet Ryloth. She appeared in Paul S. Kemp’s novel Lords of the Sith which focused on Darth Vader and Emperor Palpatine’s activities between Revenge of the Sith and A New Hope and in the short story “Mercy Mission” by Melissa Scott.
Delian Mors was the first LGBT character introduced in Star Wars canon. Her character is also one of the few female Star Wars characters I can think of that are described as being heavy (there’s a lot of skinny women in Star Wars).
“Mercy Mission” was one of three short stories in Rise of the Empire, a bind-up compilation of Tarkin and A New Dawn.