1girl, arknights, bangs, belt collar, breasts, collar, eyebrows hidden by hair, hair between eyes, hair in mouth, hand in own hair, heisehaidaitang, horns, jewelry, long hair, looking at viewer, mouth hold, necklace, pink hair, red hair, shirt, simple background, solo, surtr (arknights), surtr (liberte echec) (arknights), upper body, white background