not seeing any ouka here. i see the regular nipaa rika in the front, shrine maiden watanagashi rika on front left, rika's imagined "i'm a witch" larp, frederica on front right, witch rika aka real bernkastel in the far back, and two more rikas in the background, right one may be sundress rika, left the school outfit rika, same as the front one but maybe without the false cheerful personality.