Yamada Doma

Yamada Doma (山田道茉) is a fictional character in the Shaman King Zero manga series. Doma was a rival onmyōji of Hamono Tadatomo. In secret, he worked with Tadatomo to turn Daitaro into a human shikigami.

History
Doma and Hamono Tadatomo were rivals as onmyōji. Doma used to be the head Onmyōji for the Emperor until Tadatomo defeated him. Ever since then, Doma had been sought a way to get revenge on Tadatomo during the annual exorcism ritual before the Emperor. However, Tadatomo always beat Doma.

After Mappa Doji became Tadatomo's apprentice, Daitaro—Tadatomo's other apprentice—became jealous and decided to help Doma, but only so that he could beat Doma's chimimoryo in the hope that it would impress Tadatomo. Unknown to Daitaro, Doma and Tadatomo had been working together. On the night of the exorcism ritual, Daitaro stepped forward to exorcise the chimimoryo, but Tadatomo stabbed Daitaro and revealed his plan with Doma: to turn Daitaro into a human shikigami.

Trivia

 * Doma was based on Ashiya Dōman.