Nago

"Disgusting little creatures. Soon, all of you will feel my hate, and suffer as I have suffered!"

Nago is a boar god who turned into a demon after being shot by Eboshi and later killed by Ashitaka with his arrows. When Nago's curse touched Prince Ashitaka, it cursed him as well, dooming him to die slowly from the mark.

Looks
Nago has brown fur and light green eyes. As a demon, Nago resembles a giant spider with worms crawling over him and red eyes.

Background
Nago was the leader of a nearby Boar Tribe who fought off Human advances from Iron Town as they sought to encroach on the mountainside. Initially, Nago met with success and the Humans were unable to establish operations or excavate the mountainside due to Nago and the boars attacks. This success changed when Lady Eboshi and her rifleman arrived, putting a stop to Nago and the Boar Tribe's campaign. During battle, Nago was shot and left with a ball of iron within his flesh. Slowly corrupting him when coupled with Nago's rage and fear of death - Nago became a Demon God and rampaged along the countryside until arriving after some time to Ashitaka's village.

During a heated battle in which Ashitaka attempted to plead with Nago for mercy on his Tribe, Ashitaka slayed the Demon God by firing arrows into his eye and skull. During the alteration, Nago cursed Ashitaka with the mark that would eventually see him expelled from his village.

Despite the Wise-Women promising funeral rites and wishing for Nago to pass on in peace, Nago died with hatred and regret in his heart. With his dying words he promised the Humans a similar fate to that which he and his boars had suffered.

Nago's death and transformation into a Demon God had a profound impact on the remaining Boar Tribes, who were seemingly now under the command of Lord Okkoto. The surviving boars were adamant to destroy Iron Town and the loss of Nago's Boar Tribe at Iron Town starts the events in Princess Mononoke.