anime style, best quality, highres, cel shading, 1girl, solo, saten ruiko from toaru kagaku no railgun, long black hair, straight hair, side-swept bangs, blue eyes, white flower hair ornament on one side, dark indigo denim skirt, pleated skirt, one hand raised beside her face, open palm, waving, other arm relaxed at her side, torso facing viewer, slight head tilt, confident smile, closed mouth, slightly raised eyebrow, faint blush, looking at viewer, grin, riverside promenade, metal railing, river, distant city buildings, blue sky, soft daylight, muted background colors, softly blurred background, gello_tshirt, frog print, text, "GELLO!", mustard t-shirt, dark brown outline print

worst quality, low quality, realistic, ai-generated, extra digits, fat,