Sesshomaru (殺生丸, Sesshōmaru?) is a fictional character in the anime and manga series InuYasha created by Rumiko Takahashi. He is the older half-brother of the series' protagonist, InuYasha. Sesshomaru's role in the series has varied from antagonist, to hero, and most often an anti-hero, depending on his current situation, but he is consistently shown as Inuyasha's rival and the two have fought many times. Their rivalry runs deep, influenced primarily by Sesshomaru's hatred for half-breeds (which Inuyasha is) and his blaming Inuyasha for the death of their father. He also hates Inuyasha for possessing their father's legendary sword Tetsusaiga, which he believes is rightfully his.
Initially portrayed as a cold, stoic character with a hatred of humans, Sesshomaru undergoes a series of trials throughout the series that reshape his beliefs and his relationships with those around him. These trials include his care for an orphan named Rin, and his possession of his father's second sword Tenseiga, which can revive the dead.
In an InuYasha character guide, it was revealed that Sesshomaru means "Killing Perfection".