Female / 13 years old. She has a younger sister, Tana. (Tana is not a member of the Code Busters Club.) Tana is hearing impaired and is scheduled for surgery to restore her hearing soon. She is kind, smart, and fluent in sign language. Member of the Code Busters Club. Code Name: Code Red. She has red hair and green eyes.

Male / 13 years old. He loves computers and video games. He always wears sunglasses. (He takes them off occasionally at home.) Member of the Code Busters Club. Code Name: Lock and Key. He has spiky hair and brown eyes.

(Full Name: Maria Elena Esperanto) Female / 13 years old. Her clothes are always unique. Member of the Code Busters Club. Code Name: M.E. She has long brown hair and dark brown eyes.

Male / 13 years old. He likes wearing baseball caps. He is the tallest member of the Code Busters Club. He is good at sports. Member of the Code Busters Club. Code Name: Cool Dude. He has black curly hair and very dark brown eyes.

Female / 13 years old. A total model student. She is kind, smart, and has a great sense of fashion. (A bit of the opposite of Maria...(?)) Member of the Code Busters Club. Code Name: Senjin (Said to be named after her great-great-grandfather.) She has a black bob cut and brown eyes.