Luna (SMCU)

Luna is a talking black-purple cat that advises Usagi Tsukino/Sailor Moon and the rest of the Guardian Senshi alongside Queen Serenity. She lives with Usagi and she is shown growing close to Artemis, another feline guardian who belongs to Minako Aino/Sailor Venus. In her human form, she can be called Sailor Luna.

Appearance
In her cat form, Luna is black with sleek fur and has a crescent moon on her forehead. She is very petite with long whiskers.

In her human form (Sailor Luna), Luna is a young woman with curly, long black hair which reaches her waist. Her forehead bears the same yellow crescent moon that she wears as a cat, and which are also featured on her earrings. A yellow ribbon is tied into a bow around her neck as well as crescent moon necklace. She also has an anklet of the same design above her foot. She wears an elegant, flowing gown which is yellow and black and is shorter in the front than in the back. Her eyes are aqua blue, and she appears to retain her cat-like features.

Biography
Luna is kept by Usagi since she was a kitten.

Trivia

 * The average life span for a cat is 10 to 20 years. According to Luna’s ID card in the Cinematic Universe, her cat form is born in 2010.
 * In the Cinematic Universe, Luna was intended to be renamed “Cosmo” when her name is intended to be used for Usagi. Their original names are retained after KB Fan Fiction discovers that it may lead to confusion due to Luna having a Sailor Senshi form in the live action series Pretty Guardian Sailor Moon.
 * The name “Cosmo” is surprisingly similar to an existing character in the franchise, Sailor Cosmos.
 * Cosmo eventually became the name of Kousagi's originally-unnamed pink cat from Sailor Moon Universe.
 * PGSM Sailor Luna is also the inspiration behind the naming of Luna’s human form as Sailor Luna.