I am a Slytherin, muggle born student. I was bitten by a wolf at the age of 10 and have been this way ever since. The bite had a problem and I got a deformity of wolf ears always on my head so I constantly try to wear a hat. I have Alexandria's Genesis (look it up if you want to know) and scars from my old home because it was an abusive environment. They later discovered and moved my little brother and I to several new foster houses until we found our official family. The year that we ended up with them is when I was bitten, a year later I was reading in my room when I heard a tap on my window. I opened it and in flew a barn owl that dropped a letter on my bed and then left. That is how I ended up where I am now.
(Thanks to RInmaru for helping me make my cover picture)