Cursed demon heart

Naraku (奈落) is the main antagonist in the anime and manga series InuYasha. He is directly responsible for the death of the character Kikyo and the seal placed on the series' protagonist, Inuyasha. He is also the cause of most of the troubles and problems facing the other major characters, making his destruction the overall focus of their quest due to the pain he has personally caused them.
As half-demon and later a demon, Naraku desires the Shikon-no-Tama, a jewel that would be able to grant him near-invincibility should he acquire all the pieces of it. Although early in the series he desires the jewel to purge his half-human self from his body, he desires the jewel to enhance his strength even further. He is repeatedly opposed by Inuyasha and his friends, along with several other characters in the series.

Once, there was a man named Onigumo (鬼蜘蛛, おに ぐ も,oni kumo onigu mo "demon-spider"), who was full of deceit and hatred for others. The manga tells us almost nothing about his life before he meets the protagonists, but the anime adaptation shows him in a flashback associated with a group of roaming thieves. It tells how he tricked his bandit leader, Rasetsu (the elderly man in the anime who gives Kikyo his top knot to be sent to Mount Hakurei in order to purify his soul) into approaching Kikyo and attempt to obtain the Shikon no Tama, or Jewel of Four Souls; however, Onigumo did not warn him that with Kikyo, there was a half-demon named Inuyasha. Rasetsu survived the encounter with Inuyasha, lost an eye, and returned to his camp only to find that Onigumo had made off with his troops. Rasetsu discovered Onigumo and his troops at an inn down the road celebrating their change in leadership. Enraged, Rasetsu blew up the inn, but the charred body of Onigumo somehow managed to survive the blast. Rasetsu then threw the barely-living Onigumo off a cliff. (This, however, does not explain his spider scar, as Onigumo had the scar before he met Rasetsu).

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