Is she real? A figure in the real world? Or a figment of someone's imagination? Who knows.
"Am I the only one I know?
Waging my wars behind my face and above my throat.
Shadows will scream that I am alone."
- Twenty One pilots, "Migraine"
Behind your face and above your throat, there lies a person, a person no one can see or hear, but it wants to be heard.
Go express that little person through your art, show them what that person looks like, what they feel, the things they like or don't like.
Though art is broad, it is any form of medium you wish to use as expression.