Eriol Hiiragizawa/ Eli Moon is from Great Britain. He appears in the Sakura Star season, after Sakura becomes the master of the Clow Cards. He transfers to Japan and becomes a classmate of Sakura. He is very courteous, but he bothers Li Shaolan, whom he calls his "cute/small relative!" He resembles both Fujitaka Kinomoto/ Aden Avalon, Yukito/Julian and Clow Reed.
Eriol/Eli has magical powers and a staff with a sun on the end, which looks an awful lot like Sakura's Key. He lives with and is aided by, his guardians, Ruby Moon and Spinel/Spinner Sun.
Eriol/Eli was not the normal boy Sakura Kinomoto took him for. Infact he was far from it. Eriol/Eli, as confirmed by Yue, is and was the legendary Clow Reed, creator of the Clow cards.
He is also the one who is creating new enemies for Sakura to face. This makes him seem like the enemy, but the fact remains that everytime Sakura uses a card now, it changes and becomes stronger. Eriol/Eli is merely helping Sakura.
He is, the reincarnation of Clow Reed, the incredibly powerful magician who himself created the Clow Cards. Clow Reed, upon his death, decided to split his soul, including his powerful magic, into two human beings. Eriol/Eli and Fujitaka/Aden are the reincarnations of Clow Reed. Fujitaka/Aden himself has Eriol/Eli's shadow.
The magic of Clow Reed comes from both Chinese and English backgrounds, making it doubly mystical in the sense that both of these ancient cultures believed in extreme powers, such as those described in the Clow Cards. So just in case you had been wondering why Eriol/Eli was an Asian-looking boy born in England, now you know.
He created two guardians for himself while searching for his way around the powers he inherited from his past life. They are be Spinel Sun and Ruby Moon. These two are like Kero-chan and Yue, the guardians of Sakura, one from the sun, another of the moon.
Although he is a young boy, he has mannerisms and ways about him that most definitely reflect those of a grown man. Clow Reed shining through. Eriol/Eli is quite the charmer, to say the very least. Just about everyone he meets is immediately taken by his charisma and looks. He is the type that will always be polite, addressing everyone with their respected title, and speaking with flawless grammar. But he is prone to lying, anything to get a good response from whomever he is conversing with. But despite the front he puts out, there is a much deeper and sadder side to Eriol/Eli which many, by simply chatting with him, would find hard to believe. He always looks so melancholy, even when he's smiling. When Eriol/Eli first appears, it seems that he is the villian as he manipulates Li and those who Sakura loves. He looks the part and he certainly is shrouded in mystery, but after a while it's obvious that his intentions are for the better.
Thus, he learns of a girl named Sakura. In order for him to test her powers, he challenges her to a "battle." But her powers have not fully matured yet, so he aids her. Eriol/Eli teaches Sakura to turn the Clow cards into Sakura cards and her powers grow.
Many people think that Eriol/Eli sort of has a thing for Sakura around this time in the plotline, however he is genuinely trying to help her and maybe trying to make Li jealous. He needs this girl's help to make things right, so naturally, he watches and plots her progress. Alsoit may appear that he is in a relationship with Kaho Mizuki who is staying at his house during the second movie and who was sent by Eriol/Eli to help Sakura in the first series.
He also knows that there is another reason that Sakura has these powers, Fujitaka/Aden, her father. Fujitaka is, or was, to have the other half of Clow Reed's magic. So this inspires Eriol/Eli further to make sure that Sakura and her powers are the best.
He absolutely hates the fact that he has all of his past powers. Therefore, he can always stick to business when it comes to his mission.
Eriol/Eli is merely a misunderstood, yet quite charming little boy who tends to be a bit over-flirtatious. This is the reason why Li Shaoran develops hatred towards him when he first appears (he kisses Sakura's hand, and Syaoran has a fit!).
In the English version of the TV show, a mistake is shown where Li and Eriol/Eli are both reading the same Japanese book. Eriol/Eli is finding it really easy because of his relationship with Clow, whereas Li is finding it difficult to understand and has to use a dictionary. Sakura comments on how Eriol/Eli must be really clever, however, surely both Li and Eriol/Eli must understand some Japanese since they both go to a school in Japan???
