Planescape - Strays!
Female half-elf(?) mage. Water elementalist?
The Lady Betide always dresses in the finest fashions— you have never seen her in the same gown twice. She moves with such grace as to be all but hypnotic, yet strangely you find you cannot fix your eye on her face. When you look away, you remember her as being beautiful, yet you can remember no details.
Lady Betide lives in the palatial estate of High Dudgeon in the Orrery, with her protege Hool Nortens.