yes, if it's not animated and a simple drawing, you can do it.
You need to create a new storyboard, with only one frame.
You'll need the 8 directions, but you could just copy the same icon in every direction (or make different icon, one for each direction).
And if you really don't want something animated, you can just make a default, and use it for attack, run, etc as well..
But I'm not sure it will look nice in game.
To sum up, it's possible to do that, but I cannot guarantee it's a good idea and it will be fun.