Cardcaptor Sakura Wiki

Notice: Nakuru describes herself as genderless and chooses to represent herself as female. Also, Nakuru is referred to as "she" throughout the series. It is due to these reasons that this article refers to Ruby Moon using female pronouns.

Ruby Moon
Series Cardcaptor Sakura
Cardcaptor Sakura: Clear Card
Also Known As Nakuru Akizuki (alter ego)
Affiliates Eriol Hiiragizawa (master/creator)
Spinel Sun (partner)
Residence Tomoeda, Japan (temporary residence)
England (residence)
Likes Annoying people
Dislikes Anything boring
  • Lunar empowerment
  • Control over the night, darkness/shadows
  • Projection of crystal shards
  • Slowed aging
  • Winged flight
  • Magic barriers
Gender None (chooses to be female)
Hair Red
Eyes Dark Red
First Appearance (Manga)
Cardcaptor Sakura Vol.7 - Chapter 29
Last Appearance (Manga)
First Appearance (Anime)
Sakura and the Mysterious Transfer Student
Last Appearance (Anime)
Ryoka Yuzuki
Sarah LeFleur (Cardcaptors)
Sarah Hauser (Animax dub)
Alexis Tipton (Clear Card)

Ruby Moon (ルビー・ムーン, Rubī Mūn) is a supporting character in CLAMP's manga and anime adaptation Cardcaptor Sakura. She is one of Eriol Hiiragizawa's guardians, designed to be the counterpart of Yue. Her temporary form is Nakuru Akizuki.


Sakura Card Arc


Like Yue, Ruby Moon has magical abilities related to the Moon.

In the final confrontation with Sakura Kinomoto, Ruby Moon fights Yue. Although they fight evenly for most of the battle, Yue eventually proves to be more determined.

After Yue and Cerberus successfully rush past Ruby Moon and Spinel Sun, Ruby Moon declares that she and Spinel are stronger in terms of power. Spinel responds in favor of Yue and Cerberus saying, "It must be the power of the heart that believes in their owner."

Though she acts somewhat naive, especially as Nakuru, Ruby Moon also proves to be quite intelligent and calculating at times, such as when fighting, or when assessing the situation with Touya and Yukito (when not interfering with them) as Nakuru.

Clear Card Arc

Ruby appears concerned about what happens but is initially unable to do anything to help while showing genuine worry.

Later, both Ruby and Spinel are sent by Eriol to Tomoeda. They both stay at Yukito's house because Cerberus and Yue lack magical power due to the departure of the Sakura Cards and Sakura expending her magic to create the Clear Cards. Thus, Ruby and Spinel say that they will stay close to Yue and Cerberus to share Eriol's magical power with one another while figuring out how to deal with Kaito.

Powers and Abilities

CCS EP69 - Ruby Moon's Crystal

Ruby's crystal fragments; their primary attack.

Winged Flight: Using her butterfly-like wings, she's capable of flying at high speeds.

Crystal Shards: Much like Yue, Ruby can create large, red crystals which fly at the opponent with great speed and power. They are capable of causing a lot of damage due to their sharpness.

Lunar Energy Creation & Control: By forming red-colored energy around her hands, she can use them as blades.

Lunar Empowerment: As the guardian governed by the moon, her magic grows stronger when she draws more strength from it.


Spinel Sun

Ruby has a somewhat friendly relationship with Eriol's other guardian, Spinel Sun. She teases him constantly and gives him a nickname, which he detests, while he makes snide remarks about her gender. Despite this, they still get along at most other times.

Eriol Hiiragizawa

Just as Yue was to Clow, Ruby is fiercely loyal to her master obeying his mysterious orders and taking care of him.


  • Being genderless is a trait that Ruby Moon shares with the angels (among others) of CLAMP's series Wish and Kobato.