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Yuko Ichihara (Also a xxxHolic series character)

Yuko Ichihara, also known as the Dimensional Witch or the Space-Time Witch, is a witch who resides in a modern day Japan's shop. In her shop, she can grant people their wishes if they can pay the equivalent price. Although Yuko is extremely powerful, to the point of being able to create gods, she cannot act without the request of another beforehand, regardless of whether the events she wishes to pass are selfless or not. She works against the sorcerer Fei-Wang Reed, knowing his purposes and helping Syaoran's group in their journey only when they pay a price. Before the series' start, Yuko met the sorcerer Clow Reed and both created the two Mokona Modoki in anticipation for the series' events. Near the series' ending, Yuko is revealed to have had her own time had been stopped by the late Clow Reed to prevent her death. Fei-Wang manages to obtain the power to achieve his goal of reviving Yuko. Just then, Yuko rebuilds the destroyed bodies from the Syaoran and Sakura clones in order to give their choice for them to be reborn as normal humans. For this purpose, she gives her life for Sakura's payment with Clow having done the same for Syaoran's. As they are reborn in the past, Yuko is revealed to have died. Yuko Ichihara is voiced by Sayaka Ohara in Japanese and Colleen Clinkenbeard in English.

Seishiro

Seishiro is a traveler who gained the power to travel between worlds from Yuko in exchange for his right eye. He searches for the vampire twins Kamui and Subaru and, like his younger brother Fuma, he is a treasure hunter. Although the reason for searching the vampire twins remains unknown, Kamui states that he will kill Seishiro if he finds them. Seishiro possesses one of Sakura's feathers which allows him to summon Oni to fight for him as well as modify them into swords he can change their shape. An experienced fighter, Seishiro was also the one to teach Syaoran his kicking techniques. Although he grows happy with his development, Seishiro does not doubt in trying to kill Syaoran in Oto Country when searching for clues about the vampires. When coming to Japan to get information about the vampires' location, Seishiro is challenged by the original Syaoran who wishes to obtain his feather. In the course of the battle Syaoran manages to claim the feather, although Fuma comments that was his main intention from the start. Seishiro later leaves Japan to continue his search, and is seen in the series' finale alongside the vampires and Fuma. Seishiro is a crossover character from Tokyo Babylon and X, Seishiro Sakurazuka. Seishiro is voiced by Hiroki Touchi in Japanese and J. Michael Tatum in English.

Princess Tomoyo

Princess Tomoyo (Tomoyo Hime) is a princess of a feudal country called Japan who sends the ninja Kurogane on the quest that causes him to join the dimension travelers. Tomoyo is the Tsukuyomi, a powerful miko sorceress responsible for maintaining the wards of Japan that protect the country from demons. She is also a dreamseer with the ability to see into other people's, can send trans-dimensional messages through dreams. However, she gives up her dreamseer power to Yuko as the price for bringing Kurogane's group to Japan as she manages to see them in danger following their encounter with Ashura-o. Another incarnation of her known as Tomoyo Daidouji (Daidoji Tomoyo) appears in Piffle World, where she organizes a race whose winner would rewarded with one of Sakura's feathers. The whole event is then revealed to have been made to return the feather to Sakura as Princess Tomoyo contacted her about the group's arrival. Another incarnation appears in the animated film in which she is the princess from the Birdcage Kingdom and is opposed by her uncle. Tomoyo is voiced by Maaya Sakamoto in Japanese and Amber Cotton in English.

Clow Reed (Also a Cardcaptor series character)

Clow Reed (Kuro Rido) is a sorcerer who once ruled Kingdom of Clow, but is dead during the series' start, and appears in flashbacks as the father of Sakura and Toya. It is later revealed that Clow knew Yuko Ichihara, with whom he had a close relationship. Both of them created the Mokona Modoki creatures in aniticipation for the series' events, while he also knew of to the creation of the teenager Kimihiro Watanuki. When Yuko was about to die, Clow wished for her to keep on living. As a result, his immense magical powers stopped Yuko's time, granting his wish, but also making him regret being the strongest sorcerer. Additionally, it is revealed that he foresaw the original Syaoran's wish of turning back the time when the original Sakura was about to be killed. As turning back the time changed the fate from Sakura's parents, Clow travelled to Kingdom of Clow to replace Sakura's father, Fujitaka, as the king of Clow. Before dying, he left his life and magical power which would be used to make the Syaoran clone be reborn as a normal human. Clow is voiced by Yu Mizushima in Japanese and Jim Foronda in English.

Yukito

Yukito is a kind and respectful High Priest of Clow Country and a close friend of Toya. After Sakura, he has considerable magical powers, including the ability to see into the future, thus the reason why he was chosen to become the country's high priest. He is one of the few people who know Yuko Ichihara as the Witch of Dimensions and is responsible for sending Syaoran and Sakura to her in hopes of recovering Sakura's scattered memories.Various versions of Yukito appear in other worlds featured in Tsubasa, all in which he keeps his friendship with Toya. Yukito is voiced by Koki Miyata in Japanese and Robert McCollum in English.

Subaru

Subaru is one of the vampire twins alongside Kamui that Seishiro is hunting and travels throughout dimensions to escape from him. However, he and Seishiro share a close relationship, as he is his main target, and Subaru once gave him his blood. Upon arriving in the world of Tokyo, Subaru fell asleep due to two of Sakura's feathers. He awakes when Syaoran takes the feathers from the cocoon where he is sleeping, and before leaving to another, he searches for a way to restore the water from Tokyo's City Hall. He is based on the protagonist of the manga Tokyo Babylon, Subaru Sumeragi, who also plays an important role in X. Subaru is voiced by Hiro Shimono in Japanese and Micah Solusod in English.