Kirara

Kirara is originally the companion of Midoriko, the miko who created the Shikon no Tama, suggesting that she is far older than she seemed, which made her the oldest member of Inuyasha's group. Sometime later, she became Shako's family companion, was passed down by Shako to Sango's father, and then by Sango's father to Sango when she was still very young.