Tris Prior Omega

Tris is a orphan she is 18 same age as the alpha who has never seen her but he has a girlfriend they aren't imprinted on each other or whatever you want to call it so the Alpha isn't suppose to be with his girlfriend any ways Tris has never met the alpha but she has met his girlfriend ,Tris is the only omega so people laugh at her,Any ways the alpha who's name is four at least that's what people call him no one knows his real name,the Alpha's girlfriend beats Tris.