Catgirl
Catgirls are female humanoids with cat ears and tales[1]. They feature prominently in both Pandora's Tale and Thinking Too Much to Think Positively.
In Pandora's Tale
Real catgirls are usually Helpers[2][3], but some fictional catgirls are not [4].
Metafictional Catgirls
The tabletop RPG Land of Legends: Lost has a species called the werecat.[5]