Tomoyo Daidouji is series protagonist Sakura Kinomoto's best friend and her second cousin on her mother's side. The daughter of the president of Daidōji Toy Company, Sonomi Daidōji, Tomoyo lives a life of wealth and is watched over by a team of female bodyguards. She has access to a variety of prototype technological gadgets from her mother's company, and supplies Sakura and Cerberus with different communication devices throughout the series. She is depicted as being mature, kind-hearted, and intelligent, and regularly speaking using more formal verb conjugations and expressions than normally seen in elementary students. She is a talented singer, and is shown performing in various school events.