The Pioneer is the primary avatar character used to navigate the Homestead. As the Pioneer progresses through the game, he/she can be married to a Spouse, and have Kids. Your Pioneer is the Leader in the Pioneer Trail.
You can change your Pioneer's appearance by visiting your Family Album via the My Stuff menu. When the Family Album menu appears, you may select which avatar you wish to edit by clicking on the Customize button below them. This will display the avatar customize screen, where you can modify skin, eye color, facial features and clothing. You can purchase more Clothes for your family at the Tailor Shop.
You can make your Pioneer walk by clicking on the map with the Tend tool selected. In this mode, you can tell your Pioneer to walk anywhere on the screen by clicking on that location.