cameo

For posts where copyrighted characters appear as inconspicuous background characters or when they appear in various media such as posters, figures, charms, cellphone straps, etc.

Cameo request can be used for unidentified cameos.

Particularly common cameos include Sanrio characters, Chiikawa characters, Gloomy Bear, and other kawaii mascot-type characters. Cameos tend to be more popular in Western and Chinese original artwork, where copyright law is generally taken less seriously than in Japan.