How to make a good creepypasta oc

I've made alot of creepypasta OCs in my time. I thought I could help the other aspiring character designers out there. Just saying, I am in no way an expert on making OCs so I don't know how good this information will be but we will see.

WWII: A Railway Series Tale

Dear Readers, War is a terrible, terrible event. One that cannot be prevented nor stopped. When the fire is stoked, no amount of water can put it out. However, a little blue tank engine proved his worth and with the help of his friends, protected his Island... It all happens here. - The Author