Sessh maru was a powerful dog daiy kai and feared throughout the feudal world. He was the half-brother of the hanyInuyasha and the first son to the Inu no Taish , their father. Unlike many other y kai, he had no interest in possessing even one shard of the Shikon no Tama to enhance his powers. On his journey, he was accompanied by a two-headed dragon named A-Un, a demon imp named Jaken, and an orphaned human girl named Rin.
Sessh maru, dissatisfied with his sword Tenseiga, wishes to have the old, absent-minded sword smith T t sai make him a new one. The unwilling T t sai has Inuyasha defend him, causing the brothers to fight. T t sai reveals the heritage of Sessh maru's sword before creating a diversion to allow Inuyasha and the rest of his companions to escape. Soon after leaving Inuyasha and his companions, T t sai is attacked by Sessh maru. Once again, Inuyasha battles his brother as T t sai's protector, but must now face Sessh maru's newest defense: a dragon's arm. As Inuyasha and Sessh maru continue to duel for possession of Tessaiga, both brothers discover the unexpected power of their respective inheritances, as Inuyasha discovers the true power of his sword, and Sessh maru, who called his sword useless, is saved by his father's heirloom. After the fight, an injured Sessh maru is helped by the orphan Rin, whom he was originally going to leave dead but revives with the Tenseiga after she is killed by K ga's wolves because it pulsed. He then sets off and Rin follows him, becoming his companion.
The same cosplay costume comes from: