Y/N finds a old Chest full of Stone Capsules(the capsules from the crank-a-kai) will looking through his Grandmother's attic. Curious he asks his Grandmother about them, she had found an old gachapon in the forest and got a bunch, but the Gachapon just never seemed to lower, and she couldn't bring herself to open them due to her old age, as well as the possible supernatural connection the capsules could have. He decides to open one, and after much effect, it budges and begins to glow brightly, before popping open, revealing a Watch, a slightly bulky old watch. The Yo-kai watch Proto. He then chooses to open another one after putting on the Watch. However, the capsule flickered gold before popping open immediately with a crimson cyclone blasting into the air, and a slender figure in a Red robe, white hair, and... dog ears??? The figure lands on the ground, revealing a girl.(Inuko, female inuyasha)

Inuko was sealed in the Gachapon along with other yokai, like Shippo, Kirara, Yura, Hiten.

Sesshomaru is also female, but was not sealed in the Gachapon, but in the yokai world, in the moon palace with her mother, as her adopted daughter, Rin(who has undergone a blood adoption, making her a Dai Inugami Hanyo), she still mostly dislikes humans, but not as much as she used to.