A catgirl is a female with cat ears, a cat tail, or other feline characteristics on an otherwise human body. Catgirls may be found in Japanese anime and manga where they are more commonly referred to as Neko or Nekomimi, in cosplay activities both in Japan and around the world, in video games, and in online virtual world communities such as the Nekos of Secondlife.
The majority of catgirls are depicted as primarily human in form, with minimal feline characteristics, such as cat ears, tail, and eyes with vertical pupils; some wear over-sized mittens and shoes that look like paws. Other catgirls are more animal-like in appearance, with full body fur and claws being their most prominent aspects.
Unrelated characters include those whose hair sticks out and resembles cat ears, but do not actually wear cat-like ears, as well as other animal combinations such as bunnygirls, foxgirls and (more rarely) doggirls, referred to as kemonomimi.
Catgirls in character typically exhibit a more cat-like attitude, and may sometimes include cat gestures or sounds in written or verbal communications. A frequent running gag among catgirls is that, when talking, they habitually end their speech lines with the catchphrase nya, the Japanese onomatopoeia for a cat's meow.
Catgirls In anime and manga will sometimes sprout cat ears or a tail in order to illustrate their excitable personalities. This is similar to the phenomenon of becoming super deformed and is mostly a stylistic quirk derived from manga. They may momentarily develop a catlike mouth to emphasize mischievous thoughts or comments by a character.
In certain anime and manga series, a boy may be compared to a cat in a similar way that catgirls are. These characters are referred to as catboys. Bish?nen catboys are typically associated with sh?jo manga and yaoi. Rebellious boys are more often compared to dogs or wolves. The "lone-wolf" characterization is very common for brooding, aggressive, socially isolated males, while comparisons to dogs usually refer to adorably rebellious but ultimately harmless boys.
In sh?nen series, a (usually villainous) catgirl may be portrayed as the leader of a band of anthropomorphic animals.