Character Scenario/Child of Wither

Yoshino received a windmill from a village girl, and said it is cursed. It certainly looks tattered, but nothing happens when she touched it. What kind of curse is on it?
Yoshino	"This curse is a life-destroying curse."
Conductor	I see, a life-destroying curse.
Conductor	......
Conductor	...What?
Yoshino	"A curse that takes the life of a living creature. A very difficult sorcery for a living person to handle..."
Conductor	Oh, goodness. That girl won't be safe if she had such a thing.
Yoshino	"Yes, so we have to do something to break the curse."
Conductor	I hope you will do that by all means. From what I noticed earlier, this windmill seems to be very important to her. If possible, I would like this to be returned to her without her knowing about the curse.
Yoshino	"......"
Conductor	You're suddenly silent, what's wrong?
Yoshino	"......Yoshino, thinks should talk to you properly. There's no point in trying to fix it in secret, feeling that."
Yoshino	"Maybe that child should know about the curse."
Conductor	There may be a reason. Let's hear what you have to say, Yoshino.
Yoshino	Yoshino, just heard a strange story from the children in the village. In this village, there is a child called 'Child of Wither'.
Yoshino	"The child who withers the leaves and flowers. That's why they stay away from places with plants. It's sad that we live in such a beautiful place."
Conductor	Does this Child of Wither have something to do with the curse?
Yoshino	"Mhm."
Yoshino	"The girl from earlier. That girl is the Child of Wither."
Conductor	Yoshino then picked up a fallen leaf from under her feet, still holding the windmill. To my surprise, the leaves withered in Yoshino's palm.
Conductor	Is a life-destroying curse something that kills plants such as trees and flowers...?
Yoshino	"Yoshino saw children playing in the forest. But that child took her doll and ran in the opposite direction to the forest. That's because if he plays in the forest, she will kill all the trees."
Yoshino	"The leaves and flowers die because of the curse on this windmill. But she thinks it's her fault."
Yoshino	"That child... Yoshino wonders if she is all alone."
Having lived in an abandoned factory deep in the mountains, Yoshino knows the meaning of loneliness. She is not good at talking, but she is more sensitive than others to feelings of sadness and loneliness.
How do we break this curse? When I asked this, Yoshino raises a windmill above her head and said this.
Yoshino	"The curse can be undone with Yoshino's way, but preferably this should be done in the right way if possible. If a strong curse like this is broken by force, bad things can happen."
Conductor	But it's not so easy to identify the right way to lift the curse.
Yoshino	"Is thinking about that..."
Yoshino	"Someone has been calling this windmill for a while now. 'Kochi dayo, kochi dayo' it said. It must be someone who knows about this curse."
Conductor	So you mean that the sorcerer is near this village...
Yoshino	"Yes, very close to here. Waiting for Yoshino on top of that mountain."
Yoshino	"It's going to be dark soon and it will be dangerous. Shashou, will you still follow me?"
Conductor	Of course I will, even if Yoshino tells me not to come.
Yoshino	"Oooh- Shashou, you're really cool. You're so kind."
Yoshino	"No matter what happens, Yoshino will protect Shashou. That's why Yoshino wants you to come with me together."
Conductor	Yoshino and I went into the mountains to break the curse of the windmill. The Nishiki mountains were eerily quiet as dusk approached, and the wind that had been blowing just a few moments earlier had suddenly stopped.