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Sesshomaru  is InuYasha's older half-brother. As a full-blooded demon, he is very powerful, though he too has been unable to completely defeat Naraku. Unlike most demons seen in the series, he shows no interest in possessing any of the Shikon shards, feeling confident of his own strength and seeming to find the use of the gem to enhance one's power distasteful. He is initially ruthless in dealing with InuYasha, whom he despises as a half-demon who consorts with humans, and attempts to take the sword Tetsusaiga from him. However, Sesshomaru gradually changes after using Tenseiga, another sword made from one of their father's fangs, to revive the human child Rin.

Source from Wikipeida