Yako/Synopsis

The Misaki Stairs Arc
Yako is first seen on the other line of the phone requesting Hanako, Kou, and Nene to find body parts as an owner of it. She mentioned what use it did for her. Later, she runs over to a makeshift human with the body parts that the three put in a shine-like box, it moved a bit before it falling down into the deepest part of the boundary. Her and Kou start fighting ending with him turned into a doll. Nene read from a book she wrote, she used to scare students. A comment by someone, corrected her behavior. One day, while making dolls waiting for him to come back, she heard one day that her crush, a teacher named Misaki, was rumored to have died on the stairs. She didn't understand death until she was older. She almost kills Nene after seeing her read the book but, with interference from Hanako, stopped it. Nene ripped her yorshiro, a pair of scissors. It showed a flashback, where Misaki was finishing cutting her hair. She retreated into the Inari statue before Miskaki pulled her in to join the photo. Soon after, she transformed into her fox and bites Nene for calling her a fox. She threatens to kill her if she calls that again and tells her to call her Yako.

Searching Arc
Angered at Nene after changing the rumor to something more love based, she joins Nene by sitting on head and shoulders while she trying to find Hanako. Found Akane's hanitaro, She left before Nene went to rooftop.

The Hell of Mirrors Arc
Yako showed Hanako and Kou a portal to No. 3's boundary and tells what it felt like when she gone berserk after Hanako put in different terms of what happened to Kou to say that question.

The Star Festival Arc
Yako shows Hanako and Kou to a portal to where the boundary festival spot is at. She also helped dress Nene in a yukata and tags along. She makes a few comments through out the arc and is seen playing with a water yo-yo.