Catgirl (nekomimi / nekomusume)

The catgirl trope in modern media is historically linked to Edo and Shōwa period stories and imagery of shapeshifting cat monsters such as the bakeneko and nekomata; these earlier forms used feline traits to mark uncanny or villainous figures to audiences. Specific historical touchpoints cited in the literature include references to 18th‑century misemono that use the term nekomusume, kamishibai revivals in the 1930s (1936 noted), and postwar manga and anime developments (examples include Princess Knight in 1953, Star of Cottonland in 1978) leading to widespread presence in late 20th‑century and contemporary media. Over the postwar period the trope was largely rehabilitated from dangerous shapeshifter to a marker of cuteness (moe) and approachability in fiction.

Typically depicted as an otherwise human character with one or more feline traits, most commonly cat ears (nekomimi) and often a tail. Variations range from minimal or superficial markers (ears only, a tail, brief drawn-in ears to convey emotion, or wearable cat-ear headbands) to characters with more extensive feline physiology or the capacity to transform into a cat. English usage 'catgirl' covers wearable accessories, temporary representational devices, and fully anthropomorphic depictions; Japanese terms distinguish the ear-feature (nekomimi) from the older term for 'cat daughter' (nekomusume).

In most modern appearances the catgirl's features are aesthetic or character traits (catlike mannerisms, speech tics) and not inherently supernatural. Older narratives that inform the trope derive from bakeneko and nekomata tales in which shapeshifting into a human form appears; some fictional works retain transformation as a plot element. Abilities therefore range across works from merely behavioral (purring, feline gestures) to narrative supernatural shapeshifting where explicitly portrayed, but the supplied sources emphasize the predominately cultural/aesthetic role in contemporary media rather than an agreed set of powers.