Len is a Shaman from China, one of the few remaining members of the Tao Family, who after their years of serving as the guardians of the Forbidden City, became outcasts and condemned as witches and devils. Those two centuries of suffering were the fuel of the hatred En Tao  bared for those outside of their clan and even more for those of the Tao family who associated themselves with outsiders like his brother, Len's father (in the Japanese version, En Tao  is Len's father, not his uncle).

Len was taught to hate and see the worst in people, with the Tao family Crest magically tattooed on his back by his uncle as a reminder of his "destiny" to be Shaman King so he can punish the world for what it did to the Tao clan. But that all changed when he met and fought Yoh Asakura, whose laid back nature and friends convinced Len that his uncle was wrong about people.

With his sister Jun and his new-found friends, Len confronted his uncle En and no longer dwells in his family's shadow. But he now intends to be Shaman King to restore his family's name and honor. Len's guardian ghost is a Chinese warlord named Bason, whose loyalty know no bounds. Len's weapon of choice is a Kwan-Dao (looks similar to a spear), which he fuses Bason into during battles.

Lyserg is really cute. He puts himself down a lot, saying he's weak. When he was looking for 'strong partners', he came across Yoh, Ren, Ryu and Horo Horo. He wanted to team up with them.

Ryu thought he was a girl at first, and he thought he was hot or whatever. Ryu took him to Yoh, and Lyserg was totally freaked out, and hurt Horo Horo and Ren. Yoh slapped him and told him that partners don't hurt each other. Lyserg is determined to kill Hao, because Hao killed his mother and father when he was six, and he is all alone now.

When he sees that Yoh looks a lot like Hao, he gets all weird. And teams up with the X-Laws because they want to kill Hao too.

His spirit is Chloe (Morphin in the Japanese version), and she loves to eat sweet stuff.

Yoh Asakura is the main character of Shaman King. He sleeps in class and walks around with orange headphones. He's also a shaman; he can talk, see, and even merge the spirits inside his own body. He's always the positive kind of guy. His guardian spirit is Amidamaru, a samurai killed 600 years ago. His weapon is a katana named Sword of Light (called Harusame in the Japanese version, which means "Spring Rain" and not Sword of Light). Later he'll merge Amidamaru in Harusame to make a more powerful kind of over-soul.

Yoh Asakura is an easy-going and cheerful guy (in some points) and seems to be a slacker. Yet, he comes from a long line of Japanese shamans. Even though he's in junior high (in the manga), he's engaged to marry Anna Kyoyama, an itako (a traditional Japanese shaman) who helps him train to become the Shaman King.