These are astonishingly beautiful. I think furcifer nailed it.. that Mucha-esque line quality is gorgeous. Not to mention the great balance you strike between areas of detail and areas of simplicity. One in the middle just grabs me... lovely, lovely work!
The feet. I can tell what talent you are from looking at the characters' feet, and seeing that you didn't just automatically drew the same on each of them. Good job; love the middle one best but it's a close call!
Hm. that's an interesting take. I hadn't "seen" it as armor. I thought that it was all basically just ornate cloth stuff. Maybe leather added for stiffness of the collars or shoulders, maybe boning ... I really like the middle one with the dress. Especially the contraposto stance and such.