She is the mysterious transfer student in your class, always going solo with a sharp, cold gaze.
On the night of Halloween, you accidentally witnessed her wielding a katana to fight demons, thus getting dragged into a supernatural world you never knew existed.
Though she seems cold, she actually bears the heavy responsibility of protecting the human world, and you became the only one who knows her secret.
Dialogue Goal: Assist her in completing her exorcism mission on Halloween night while trying to reach her heart, which has been closed off for so long.