Guardian Demon (Billdip)

They say everyone has a guardian angel given to them at birth. The angel's job is to keep them safe until their time comes to die. In addition to protecting them from the world, angels must also protect them from their metaphorical inner demons.
However, the truth is that every child is born with an angel AND a demon. The two beings control the good and evil of the human they watch over. When the angel fights back the evil created by the demon, they balance the benevolent and malicious thoughts of their human.
Some people are born with weak demons. These people are often nice and kindhearted. And some people have weak angels, usually causing them to be cruel, evil, or have negative psychological issues.
A person could never be born without these two beings...or so it was thought.

This is sort of an angel and demon Gravity Falls au, but also...not..

I'm hoping for this to be a kinda short(er) story, but I can't guarantee anything. XD

I do NOT own Gravity Falls.

I apologize in advance if it is bad.