Xbooru - 1girl 2019 anthro anthro only blue body blue breasts blue skin breasts completely naked completely naked female completely nude completely nude female female anthro female only fish fish girl hair over one eye hands behind back long hair looking away marine monster monster girl nervous nipples non-mammal breasts non-mammal nipples nonesaint nude red hair sharp teeth simple background slit pupils solid color background solo solo anthro solo female sweat undertale undertale (series) undyne yellow sclera yellow teeth