1girl, ahoge, blue_archive, blush, demon_horns, demon_wings, expressionless, flat_chest, greyscale, hair_ornament, hairclip, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, long_hair, looking_at_viewer, low_wings, monochrome, name_tag, official_alternate_costume, old_school_swimsuit, one-piece_swimsuit, parted_bangs, school_swimsuit, simple_background, solo, swimsuit, tori_udon, very_long_hair, wavy_hair, whistle, whistle_around_neck, wings