Captain Vance

"In early versions of the game, Alyx was the daughter of a military man, Captain Vance, though she was very close to Eli. Vance played a compromised and dangerous role protecting the Air Exchange, while secretly organizing resistance fighters. When the Air Exchange was cut in the process of development, Captain Vance was a casualty. In one stroke, Alyx became Eli’s daughter, thus tightening up the core cast of characters. Vance’s face survives as the basis for one of the nine male citizen heads and also currently exists in his purest form as one of the hostages for Counter-Strike: Source." - Half-Life 2: Raising the Bar