Eriol Hiiragizawa is said to be half of the reincarnated Clow Reed. He has Clow Reed’s memories but sometimes forget the others. He has helped Sakura turn the Clow Cards into Sakura Cards and has helped her during the 2nd movie in capturing the "Sealed Card" although didn’t exactly tell her all that he could in capturing it.

Eriol, none the less, without his Clow Reed abilities, is almost like Yamazaki who likes to joke around. Things that Eriol have as Eriol alone are things that could joke you around and make you believe that what he said is true because of his always serious face - not like the seriousness on Syaoran’s face… lesser than that…

Before Eriol came to Tomoeda, he lived in England. After the Clow Cards were caught and Sakura became the Card Mistress, he came to Tomoeda as an exchange student from England. He has helped in turning the Clow Cards into Sakura cards by causing terrible things to happen so that Sakura would use the Clow Cards. And by the end of the 3rd Season, after the Sakura cards were turned to Clow Cards, Eriol went back to England together with Kaho, Nakuru and Suppi-chan.

Eriol, as he lived in Tomoeda, stayed at Clow Reed Mansion together with his two guardians, Spinel Sun and Ruby Moon who were known to be Suppi-chan and Akizuki Nakuru.