After surviving Doukoku's attack, and realizing the sealing character's importance, the vassals wonder how to deal with him and Akumaro. While this occurs, while looking over Takeru's condition and knowing that something is wrong, Kotoha receives a letter from her sister. The other vassals find her as they head out to get some sushi, though Kotoha now has doubts being dependant on the others. The Ayakashi Sunasusuri arrives, attacking people and inducing an insatiable appetite in those hit by his sand. After fighting the Nanashi, Shinken Yellow battles the Ayakashi by herself and loses as the others end up being affected by Sunasusuri's sand. Later that night, after the others are restrained so they do not eat everything in sight, Takeru wakes up and overhears Kotoha talking to Jii about him. The next day, Sunasusuri resumes his mission as Takeru heads off on his own. After Jii explains to Kotoha that her sister is encouraging her to be true Shinken Yellow, Kotoha arrives to aid Shinken Red, transforming into Shinken Yellow to battle Sunasusuri. She is unable to defeat him, but she uses the Inromaru to transform into Super Shinken Yellow and slays him to break his hold on the other Shinkengers. After Sunasusuri enlarges, the other Shinkengers arrive and form Samuraihaoh and destroy the Ayakashi while Saru Origami holds him off. Soon after, as Kotoha accepts her role as Shinken Yellow and, because of her, Takeru starts opening up again to the others.