"Sylune"

Floor-length robes of deep, shimmery blue. With stars, even, slowly drifting over the fabric of her costume, just to complete the look, and long, brown hair that falls to her mid-back.

Her name has been called out as an obvious affectation from D&D, which matches her demonstrated powers, largely reminiscent of various D&D evocation spells (including Prismatic Spray).