walking through a town of horror at the stroke of midnight with a demon and a pie

I'm at the top of a state penitentiary with a huge amount of zombies at the front gate. Food scources were getting low so i decided to try to make an escape. I loaded up my rocket launcher for the break of a century. While i was getting ready, i just happened to glance at the front gate. There was this undead experiment with a huge two-sided axe trying to break down the gate, and i thought,"if that thing breaks down the gate all hell is going to break loose." Sure enough with one huge blow, it smashed the gate open. You can imagine this made me work as fast as i could. I shot the rocket launcher and made the huge thing splatter along with a huge amount of zombies. I then reloaded and shot again. this time i took out the rest of the zombies and a few werewolves. I noticed the werewolves were climbing the walls so i ran for it. The vampires were asleep for the day so at least i knew they would stay there unless one of the careless wolfs decided to go through thier territory. I just kept running and running when I found myself in city hall, because i knew if i stopped running they would all come for me. I turned a corner and saw the rest of the zombies were wondering through the streets. Thats when I saw it. It apeared out of a ball of fire that shot straight up from the ground, a demon. She said in a voice so dark, "Get out of here! Your our last hope! Run! And watever you do, dont go deeper into the city! Now run!" Let me tell you, arguing with a pissed off demon isn't the greatest idea. So I decided to run, after I threw a gernade at the mob of things. When she saw the gernades she rolled hear black eyes and scooped me up. We got out of that town as soon as possible. As soon as we were safe I asked, "What the hell is going on?! Who are you?!" She replied by saying "Your the last living human being on the face of the earth, well, the only one who hasn't been contaminated by any type of contaigen. To answer your question, yes I'm a demon here to protect you. Only you can create a cure to save all of humanity." I looked closer at her and i noticed that she had human traits. Her hair was a very dark, almost black color. Her eyes were a blood-red color along with her skin. She saw me looking at her so I looked away. She said, "I was human once. When I was 15 years old I encountered my first zombie. I killed it, but I was bitten. I didn't turn into a zombie like I thought I would. Instead, the virus i was infected with mutated. The scientists said they didn't know what it was that had morphed the virus. About six weeks after the testing ended, the changes started. I was on a table in a lab when my hair got darker. My skin turned red and finally, I burst into fire, instantly killing the scientists." I wasn't sure, but i thought i saw her brush a tear from her eye. I felt kind of bad since she was the same age as me. She didn't deserve to be mutated and poked at by scientists. She was just a girl in the wrong place at the wrong time. While I was lost in thought there was something approaching from the east. I noticed movement and grabbed my shotgun. That's when I heard it. The scream of a thousand nails on a chalkboard. The little girl accually looked deadly. Bloodied shirt and mouth. Razor-sharp teeth, white eyes. The demon girl looked at her and smiled. She turned to me and said "poof" and the little girl burst into flames. Talk about barbecue.