This is Asta from Honkai: Star Rail.

(JP: アスター (崩壊：スターレイル))

Her base prompt:

hsr-4st4, side braid, blue eyes, pink hair, long hair, hair between eyes, side ponytail,

Her outfit:

black bow, center frills, black skirt, id card, black footwear, black bowtie, white shirt, sleeveless shirt, bare shoulders, thigh strap, hair ornament, anklet, hairclip, jewelry, white jacket, detached sleeves, lanyard, off shoulder, pleated skirt, collared shirt, shoes, white sleeves, long sleeves, open clothes, bare legs, miniskirt, coat, belt, multicolored clothes,