Tanifuji is the owner of Chako and she also has a child and husband.
She usually let Chako off to let her visit her half siblings Koyuki and Kotetsu. But after Chako been gone for some time, she leash her up. And later on, she briefly takes on a Shiba as a pet, but he later leaves. She later gets a phonecall from Koyuki's owner that she has been taken by a stray dog on her way to her new owner.