In the Traits tab, set the race and gender the same as your new character. Open the Creation Kit and create a new NPC.This will export your character's appearance to your installation folder (the one up from Data that contains the Skyrim.exe). Open the console (~) and type 'SPF' followed by the name of your character.Exit the character creation screen and save your game. Create your follower's appearance the same way you would create any other character you were going to play.