yoon cook, aru (blue archive), blue archive, absurdres, commentary, highres, untranslatable commentary, 1girl, black skirt, brown horns, chin rest, collared shirt, crossed legs, demon horns, feet out of frame, halo, head on head, head rest, holding, holding pen, horns, invisible chair, long hair, looking at viewer, low horns, miniskirt, nib pen (object), open mouth, orange eyes, orange halo, pen, pencil skirt, pink hair, red ribbon, ribbon, shirt, simple background, sitting, skirt, solo, white background, white shirt