Nightshade

This is Nightshade. Yeah, about time drawing him, huh!? Anyway, as him, yes, he looks exactly like Prowl, but different. Nightshade is a former Autobot who is a student of Master Yoketron and a brother of Prowl. When he figured out of his master's death, he was corrupted in depression and that depression had him lead into darkness. He left his brother, all his friends and joined the Decepticons. Years passed and he crash landed on Earth and had met his old friends again even Prowl, but things didn't go quite well. He worked under Megatron as the dark assasin of the night.