You have to move sprite collection data file into \Resources folder in the project hierarchy in order to make this work.
I suggest you create a prefab for the character head and instantiate it in start() method of a script. You can initially move the sprite off-screen and simply change its position when needed.
If there are more character heads in the scene, I suggest you use the same prefab, instantiate the sprite and set spriteID for each character in start() method.