1girl, arms_at_sides, bodysuit, breasts, character_name, covered_navel, entenca, flat_color, from_behind, from_side, grey_background, long_hair, multiple_views, original, pixiv_fantasia, pixiv_fantasia_scepter_of_zeraldia, reference_sheet, ruruna_(pfsoz), short_hair_with_long_locks, skin_tight, small_breasts, white_hair, yellow_eyes