吉井 灯子

The homeroom teacher of the protagonist.

A dependable and calm consultant for her students.
Because of how much her students depends on her, and her willingness to help them as much as she can, she stresses and lashes out.
She does not like to show this weakness to others.

Since her willpower is not that strong, her hearts crumbles as soon as her patience is exceeded and she shows a mean side. She takes care of the amnesiac protagonist, but is having trouble dealing with a student who is have a difficult time.