Why she might end up getting out of control and having fun killing people around her?
It's more than a simple feeling.
She likes to hear her victims scream and beg for mercy as if they are praying god to forgive them.
these all sounds like a melody to her ears.
Feeling like a god , makes her believe she's the one in control of life and death.
This feeling is really enjoyful for a little girl that always felt weak all the time...
So she'll continue and continue to swing her axe in air and make the sky rain blood.