Rin

Rin is a little girl which is always next to Sesshomaru. After Sesshoumaru fights InuYasha and got hurt, Rin takes care of him. After that, a crew of beast-wolves (commanded by Koga) enter her village and kill everyone, even Rin. When Sesshoumaru-sama realizes Rin's body lying on the ground, he decides to use Tenseiga to make Rin come alive. Since then Rin will always go after Sesshoumaru. The relationship between Rin and Jaken, the other member of Sesshoumaru's crew, is like the one of the big brother (Jaken) who is always jealous of Rin due to her being on the seemingly favored side of Sesshomaru.

The main important thing about Rin is that she is the only human which actually Sesshoumaru seems to like. On the last episodes Rin is left on a village with other humans, but she finally goes her heart and returns to Sesshoumaru's side and protection. In the manga, Rin is dead once again (due to her being sucked into the pits of hell) and cannot be revived by the Tenseiga (due to the Tenseiga having the ability to only revive humans once.) Sesshomaru's mother is then seen reviving her.