A Genderswap where a character who is normally genderless, Androgynous, or ambiguous is instead depicted as female. This is usually indicated by the presence of Breasts and/or Pussy.
Simply wearing a feminine outfit is not enough to qualify for this tag, unless the lower portion is tight enough to unambiguously show the absence of a Bulge.
Often used on characters from media like Houseki No Kuni and Len'En, as well as individual characters like the Pyro (Tf2), Frisk (Undertale) and Chara (Undertale).