This is Shiroko Terror from Blue Archive
good at: 0.7 - 1
Tags (character 1): Shiroko Terror, mismatched pupils,
Tags (clothes): black dress, black gloves, black choker, black high heels, x hair ornament, black jacket, large breasts, thigh strap,
Tags (weapon 1): holding assault rifle, assault rifle, pointing gun to viewer,
Tags (weapon 2, not working well): holding handgun, handgun,
Tags (character 2): phrenapates,
Tags (emotion): 1boy, male focus, mask, full armor, bandaged hand, white veil
Tags (views): from below, looking down, from side, on side, from above, on stomach, lying
Tags (others): chibi, official art, night, grey theme, rain, red theme, dutch angle, cyan paper crane