catgirl; cat-like female character
Refers to a female character with cat-like features or behavior, common in anime, manga, and games.
そのアニメの猫娘は耳としっぽがついている。
The catgirl in that anime has ears and a tail.
彼女は猫娘のコスプレをしている。
She is cosplaying as a catgirl.