Human 9 has five variations: Helmet, Bob Cut, Ponytail, Bob Cut 2, and Braided. In the Death Star Update, which overhauled the game's customization system, the ability to pair these variations with different bodies was added. In total, including all planetary defaults for the Rebel Soldier body Appearance, there are 42 unique head-and-body combinations for Human 9.
The image file names for Human 9 on the Star Wars Battlefront Companion app website suggest that Human 9's model is internally referred to as "Linnea."