Kinomoto Sakura
Sakura is an extremely energetic and cheerful character. She is very athletic, being a member of her school's cheerleading squad and an excellent runner. Her "invincible spell", "Everything will surely be all right.", has carried her through innumerable trials and obstacles as she masters her magical skills. She often comes across as naive, clumsy, and clueless, but she has her perceptive moments on occasion.
Li Syaoran
Syaoran is a distant relative of Clow Reed, the creator of the Clow Cards. As a member of the Li clan of sorcerers from Hong Kong, of which Clow's mother was a member, Syaoran believes that he should be the one to inherit the Clow Cards, not Sakura Kinomoto. He acts cold and nonchalant to Sakura, not even calling her by her name.
Daidouji Tomoyo
Tomoyo is the best friend of Sakura Kinomoto. When she discovers that Sakura has become the Cardcaptor, she becomes Sakura's primary assistant by designing "battle costumes" and filming all of her magical (and non-magical) endeavours. The videotaping, however, seems to be more to Tomoyo's personal benefit and enjoyment than it is to Sakura's. Tomoyo faithfully keeps Sakura's new identity secret and often covers for her in times of need.
Cerberus
By nature, Cerberus is bossy, demanding, and gluttonous, but he also genuinely cares about Sakura and believes that she will become the next Master of the Clow as he acts as her guide to gather the Cards. His hobbies include playing video games (which he takes up when he finds the console in Sakura's room and develops great skill) and eating snacks and sweets, even though, drawing his power from the sun, he generates his own energy, and does not need to eat to survive.