Original Name ケルベロス
Romaji Name Keroberos
Nicknames Kero, Cerberos
Series Cardcaptor Sakura
Age Unknown
Weight Unknown
Height Unknown
Date of Birth Unknown
Blood Type Unknown


Keroberos, also known as Kero or Cerberus, is a character from the Cardcaptor Sakura anime and manga series. He has a distinct personality that adds depth to his role in the story. Keroberos is often portrayed as bossy, demanding, and selfish, but underneath his tough exterior is a genuine affection for Sakura, the main protagonist.
Despite his sometimes gruff demeanor, Keroberos shows a strong sense of responsibility as the appointed guardian of the book that contains the Clow Cards. He takes his role seriously and acts as a mentor and teacher to Sakura, guiding her in the capture of the cards and protecting her from potential threats.
Keroberos has a fondness for sweet foods and video games, which adds a playful and light-hearted aspect to his character. He is shown to be protective of Sakura, especially when she is in danger or hurt. Over the course of the series, Keroberos develops a close bond with Sakura, becoming her friend, companion, advisor, and protector.

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Keroberos is one of two magical creatures created by Clow Reed, the original master of the Clow Cards. Before his death, Clow appointed Keroberos as the one to select the potential candidate to become the next Master of the Cards. When Sakura accidentally releases the Clow Cards, Keroberos chooses her as the candidate and teaches her the basics of capturing the cards.
Throughout the series, Keroberos displays a vast knowledge of mysticism and acts as a source of guidance for Sakura. He remains by her side as a trusted ally and confidant, assisting her in her journey to become the Master of the Clow Cards.


In his false form, Keroberos appears as a small figure resembling an orange stuffed animal with wings. This form is his primary appearance throughout the series, and is often seen perched on Sakura’s shoulder or nearby. However, Keroberos has a true form that is a large-winged cat. To access this form, Sakura must control the Firey and Light cards.
Keroberos draws his life energy from the sun, making him independent of his master’s magical power. Unlike his counterpart Yue, Keroberos does not depend on his master for sustenance. He is depicted as a lion-like creature with armor, emphasizing his role as a protector.


As the guardian of the Clow Cards, Keroberos possesses several abilities. He has extensive knowledge of the Clow Cards and their powers, allowing him to guide Sakura in their capture and use. Keroberos also has the ability to communicate telepathically with Sakura, giving her advice and instructions as needed.
In addition, Keroberos has a strong sense of intuition and can detect the presence of magical activity or potential threats. His role as a protector is evident as he remains alert and watchful, ensuring Sakura’s safety throughout her journey.


Keroberos is inspired by the Greek mythological figure of Cerberus, a three-headed dog charged with guarding the gates of Hades. The name “Keroberos” is derived from Cerberus, symbolizing his role as a guardian. This connection to Greek mythology adds a layer of depth to his character and is in keeping with the mystical elements present in the series.

Keroberos – FAQ

Who is Keroberos in Cardcaptor Sakura?

Keroberos, often referred to as Kero-chan, is a fictional character in the anime and manga series “Cardcaptor Sakura”. He is a guardian creature known as “Cerberus” and serves as a guide and mentor to the main protagonist, Sakura Kinomoto.

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What does Keroberos look like?

Keroberos appears as a small, cute, and somewhat chubby creature with a lion-like appearance. He has golden yellow fur, large wings, and a small pair of horns on his head. In his true form, Keroberos is much larger and resembles a majestic winged lion.

What role does Keroberos play in the series?

Keroberos’ main role is to assist Sakura in her quest to capture the magical Clow Cards. He has great knowledge about the Clow Cards and their powers, and he guides Sakura in her magical adventures. He also helps Sakura in her personal life, offering advice and support as a trusted friend.

Can Keroberos transform into another form?

Yes, Keroberos has the ability to transform into a small plush toy form that resembles a cute stuffed animal. In this form, he can easily accompany Sakura without drawing attention to himself. This transformation is known as the “Small Form” or “Kero-chan Mode”.

What are Kero-chan’s special abilities?

Keroberos has several magical abilities. He has the power of flight and can manipulate fire, often using it to create barriers or attack enemies. He also has the ability to detect the presence of Clow Cards and sense their magic. Keroberos is an ancient and powerful magical being, making him a formidable ally.

Does Keroberos have a personality?

Yes, Keroberos does have a personality. He is often portrayed as arrogant, demanding, and sometimes lazy. However, he genuinely cares about Sakura and her well-being. Despite his initial gruff demeanor, Keroberos is loyal, protective, and can be quite humorous. His interactions with Sakura and other characters provide comic relief throughout the series.