A specific type of transformation in which one character is made into a copy of another, though not necessarily a perfect clone. To keep in line with twys, only tag images that show or reference the character that is being transformed into existing separately from the character that is being transformed. If the original character is not referenced it is tf_into_fictional_character without twinning,

Not to be confused with species_transformation when a character transforms into the same species as another, but not the same individual.