1girl, blush, border, breasts, cleavage, collarbone, crab, full_body, grey_hair, idolmaster, idolmaster_shiny_colors, long_hair, looking_at_viewer, mermaid, mk_ii_(maebrasan), monster_girl, monsterification, navel, open_mouth, purple_eyes, scales, sitting, smile, solo, white_border, yukoku_kiriko