Yuah Korlann is one of the most important characters in the Senta and the Steel Dragon series. She has probably the most important arc for any of the characters and it is one of the most tragic in some ways. It is a story of rise and then fall.
When we meet Yuah in Book 0: Brechalon, she is Iolanthe Dechantagne's dressing maid, a position for which there is no up side. She has grown up in the Dechantagne household and even attended lessons with Terrence, Iolanthe, and Augie when they were children. She loves Augie like a brother, hopelessly pines for Terrence and her relationship with Iolanthe is complicated to say the least. Iolanthe seems to enjoy putting Yuah in her place.
Yuah is a Zaeri, the minority religion, and this poses problems for her, especially considering there seem to be few Zaeri of marrying age aroud.
When I wrote the first draft of The Voyage of the Minotaur, Yuah was named Ewa. I changed it to match her father's name and because I kept mispronouncing it in my head. I like the name though, so someday I'm going to have a character named Ewa.