Alex is a person with the ability to see demons.

She decided to research information on them when she was 14 years old.
She will not talk about her past often.
Her life was great till she left Spain in age of five.
She got beaten by her dad anytime she didn't get a good grade in school,
He wanted her to be very good at specific things, and he didn't care about her dream of becoming a singer.
In Highschool, she got an Abusive Boyfriend, Later in Collage a Girlfriend that cheated on her.

Because of that, Alex made a promise to herself, to never get in any relationship.