Alyx Vance is a female second protagonist in series of Half Life 2 and episodes. She is a rebel, that isn't going to keep up with Combines's laws. She is 19 year old, but not so fragile as she may look. She knows how to deal with guns and close combat, but she is still a bit weak against groups of Combines. She also knows how to hack different things. She is Gordon Freeman's best friend. 
She is wearing a white shirt, brown jacket and blue jeans. Her chest is small, and her butt is medium sized.