This is Acheron's wife Black Swan from Honkai: Star Rail.

Her base prompt:

hsr-bl4ck5w4n, purple hair, purple-yellow eyes, hair between eyes,

Her outfit:

high heels, thighhighs, high heel boots, detached sleeves, black shorts, black footwear, elbow gloves, cleavage, purple dress, pantyhose, covered navel, sleeveless dress, black gloves, bare shoulders, veil, thigh boots,