Hayase/Plot

Oniguma Sacrifice
Hayase is first seen when she comes to take a sacrifice for Oniguma, who Pioran chooses to be March. On the way to the altar, March escapes with the help of Parona's arrow. Parona is captured by Hayase's men while she chases after March. When she finds March, she is accompanied by a feral Fushi whom Hayase takes no note of, disregarding her men's claim that he is a monster. Hayase drugs March with Morning Glory and she falls asleep. Hayase ties the sleeping March to altar, Parona rushes in to save her and Hayase shuts her in as Oniguma arrives. As Hayase is leaving the altar, Fushi enters but she does not notice until the door closes. Hayase watches amazed as Fushi battles Oniguma in his wolf form. Hayase believes it to be an act of the gods. After Oniguma is defeated she enters the altar and frees March. She tells Parona and March that they can die there or come with her to Yanome and says that she will lie about the sacrifice, they choose Yanome.

Yanome
Hayase brings Fushi, March, Parona, Pioran, and Oniguma to Yanome with her. While Fushi, March, Parona, and Pioran are in the carriage Pioran tells them the truth about Yanome, that Yanome uses the ritual to control Ninannah as that is the goal. Once in Yanome, Hayase treats them kindly, feeding them and purchasing gifts and clothes freely. When March asks to write a letter to her parents, her men are concerned that it will blow their cover. She then tells March that Ninannah has no written script so her family won't know what she's saying. March puts a handprint on a piece of paper and claims it says "March is okay" and Parona takes it and says they will send it when they know the address. Hayase takes them to eat, but again uses Morning Glory to make them fall asleep. She puts them in a prison while sedated. While back at the prison, Hayase tells her superior about the immortal and how it defeated Oniguma. She believes that it is essential for Yanome's prosperity. Hayase puts March in charge of the immortal because it is content with her. She says no guards want to care for Oniguma and finds March hiding under its paw and makes her do it. She puts Parona on cleaning duty. Unaware to her, they make a prison escape.

March's Death
Hayase tracks the escaped prisoners: Parona, Fushi, Pioran, and March. She attacks their carriage and battles Parona. While shooting an arrow aimed at Parona, March blocks it with her body. This upsets Fushi and it attacks in its bear form, tearing apart the town. After March dies, Parona goes to calm Fushi down telling it that it doesn't need to fight for March anymore. She approaches Hayase who is heavily wounded and picks up a knife. Instead of finishing off Hayase, Parona attempts to kill herself to join March but is stopped by Fushi. She and Fushi return to Ninannah with March's body, leaving Hayase behind. Once back in Ninannah, 6 months after she went missing, along with Fushi in its Oniguma form the tribe welcomes her with open arms. Shortly after their arrival she warned that Yanome's soldiers are nearby. Parona goes to survey and sees Hayase looking for Fushi. She shoots an arrow aimed to kill her with a bow, but only hit her hand. Hayase turns to her with a scarred face and smiles.

4 Years Later, Jananda
Hayase is not seen until Fushi and Pioran travel together after Gugu's death. Hayase tells Tonari to get Fushi and Pioran aboard Captain Skyfish's ship to Jananda. Once in Jananda, Fushi works with Tonari to escape. While he is asleep, Hayase approaches him and licks his face. Hayase joins the battle to become the leader of the island. She faces off with Fushi. She tells Fushi that she killed Parona as a gift to him by ripping out her intestines and cutting off her head. This angers Fushi and he shouts out "I will kill you" to which she laughs. Hayase wins the battle by using Morning Glory to make him fall asleep. After winning, Hayase tells the people of Jananda to watch over and protect "Her Fushi" and names Tonari the true leader. She takes Fushi to her home. While Fushi is still asleep, Hayase undresses completely and climbs on top of him. Her intentions are to take advantage of Fushi while he sleeps, but she is interrupted by Tonari who has come to his rescue.

Nokkers Attack on Jananda
Hayase fights the Nokkers who invaded the corpse pile on Jananda. While fighting, she asks the Nokkers if they wish to control Fushi like she does. She says that they will not be able to control Fushi with force but she says that they must be kind, like her. The Nokker enters her body and she tears it out with a smile. She looks down at the battle and sees Tonari running with Sander. She aims a weapon at her neck to kill her but is attacked by Fushi in Oniguma form. She laughs and says "will you kill me, Fushi?" She continues laughing at him saying that it's funny how he has the opportunity to kill her but won't because he doesn't want to kill. She says if he doesn't kill her fast his friends will die. Fushi saves Tonari from a Nokker but there are only three left, Mia, Uroy, and Uba's bodies. Fushi hesitates to kill them, as they are his friends. Hayase appears and knocks out Tonari and asks Fushi is she should kill the children for his sake so that he may live a pristine life without dirtying his hands. She claims to have taken the role for his sake. She tells Fushi to choose, Tonari lives and she kills Mia, Uba, and Uroy. Tonari hears this and pulls herself and Hayase into the fire. Fushi knocks her aside and saves them both. Fushi puts Hayase to sleep with her own drug and kills the remaining Nokkers.

Leaving Jananda
Fushi leaves Jananda with an unconscious Hayase to protect Tonari and Sander. While Fushi is rowing, Hayase wakes up and smiles. Fushi asks her what her goal is, she says it's to be with him. Fushi asks why did she kill March and Parona, Hayase says it's because they were monopolizing Fushi to steal him from her. Fushi is confused and Hayase says that she did it because she loves him. She feels sorry that Fushi has never felt love before and told him to offer her his body and she would show it love. This enrages Fushi and Hayase tells him to kill her and become her, to make her his strongest vessel. Fushi creates another boat and climbs into that, leaving Hayase. Fushi tells her "I hate you, I couldn't care if you die. Never come near me again". Hayase responds, "I know", and Fushi is gone. When he is gone, Hayase sees a Nokker's core and it attacks her, she screams.