Name: Ruby Moon
Dubbed Name: Ruby Moon
Master: Eriol Hiiragizawa
Birthday: Secret (Different from Nakuru's)
Symbol: Moon
Aspect: Light
Eyes: Dark Red
Hair: Red
Magic: Western
Favorite Food: Doesn't Eat
Favorite Thing: Being Annoying
Least Favorite: Boring Stuff
Temporary Form: Nakura Akizuki

Facts:
She resembles Yue.

Storyline Role: Eriol's Guardian
Ruby Moon was created by Eriol and serves as his guardian. It is she who fights Yue at the last battle when Sakura needs to transform the Light and Dark Cards in order to save Tomoeda. Even though she acts like a villain, Ruby Moon really means no harm to Sakura and only wishes to help her transform her cards.