Ok, some of you out there might not know what a seiyuu is...It's a term for the person that speaks for a character in an anime. The voice that you are hearing on the TV is the voice of an actual person, yes...^^;; ok now that you got that...on with the list:
Sakura's seiyuu - Tange Sakura
Kero's seiyuu - Hisakawa Aya
Tomoyo's seiyuu - Iwao Junko
Syaoran's seiyuu - Kumai Motoko
Yukito's seiyuu - Ogata Megumi
Touya's seiyuu - Seki Tomokazu
Meiling's seiyuu - Nogami Yukana
Keroberos's seiyuu - Onosaka Masaya
Fujitaka's seiyuu - Tanaka Hideyuki
Nadeshiko's seiyuu - Minaguchi Yuko
Clow Reed's seiyuu - Hayashi Kazuo
Eriol's seiyuu - Sasaki Nozomu
Nakuru's seiyuu - Yuzuki Ryouka
Suppi's seiyuu - Touma Yumi
Kaho's seiyuu - Shinohara Emi
Sonomi's seiyuu - Itou Miki