So most of you lovelies will know my Transformer character, Darknova. You should also know that he is a mute. And being how much I love my Nova, I've actually made up his own little 'sign language' xD Don't take any of these signs as actual sign language, they might mean something completely different than what I am implying, this is just the silly language I made up for my Nova. I'm doing a few signs because...I felt like it |D And the ninja scarf is because he has a mask on all the time, so you wouldn't be able to see facial expressions.
So here we have one that can be used many ways. He's a Medic, so if he's replacing a T-Cog for say, he'll need to ask his patient if they can Transform. If it's a question, he'll open his hand to expose his palm to whomever he's asking at the end.