The head onmyoji and primary antagonist. Motivated by a desire to overthrow the emperor, he manipulates court jealousy, awakens Prince Sawara's vengeful spirit, and is ultimately defeated and killed by Seimei.
They are the film's primary opposing onmyoji.
Seimei counters Dōson's curses, redirects a talisman toward Dōson's lair, and finally traps Dōson inside a magical barrier.
Their direct confrontation marks Hiromasa's major sacrifice.
Hiromasa tries to stop Dōson from reaching the imperial palace and is mortally wounded when Dōson throws back his arrow.
Their opposing actions reveal tension between occult conspiracy and court authority.
Dōson is implied to be behind the accusation that Seimei and Aone cursed the infant prince, while Morosuke intervenes to block the unlawful execution.
Aone becomes a direct victim of Dōson's manipulation.
Dōson's conspiracy leads to the arrest of Aone, and one of the imperial police attacks her under his enchantment, severely wounding her.
Explore the full interactive character relationship map of Onmyoji