Emma wishes she never was born, Not because of family or school.
To anyone, Emma is just a normal innocent girl.
But in the inside, Emma has a demon that ruins her life. Emma calls her inner demon "Chi" which means Blood.
Occasionally Chi takes over when Emma gets hurt by others but Emma can easily control her then but there are times when she can't calm Chi down:
When depress: One Kill
On a full moon: Quick hunt
On an Eclipse: Loses control

One day, It was a middle of a class and Chi decides to talk to Emma.
When this happens only Emma can see Chi in front of her and people give her strange looks when they hear or see Emma talking to no one.
"Emma~! It's a week until an Eclipse"
This made Emma freeze and stops writing, her eyes grow wide and her breath becomes shaky
"...It can't be"
She whispers and made sure no one hears her then looks back at her smirking demon
"What are you so afraid about, no one knows it's you"
"But you kill innocent life!"
She whisper yells quietly and hoping that no one can hear her