In my Bio class we have a pet turtle and it really seems to like to see what people are doing if they stand near the tank, but if you put your finger on the glass it gets scared and sucks its head in. I thought KO kind of looked like the turtle.
This is the first time I've dared to try and draw his body... (I lost patience trying to find references so Star's body looks awful)
Starscream is like the whiniest Transformer. In all the movies and the two and a half shows I've watched, I don't think there's any TF that can match the amount of bitching he manages to pull off in a single episode. Which is why he's my favorite character (though so is KO).

I'll attempt to color this if I ever get this kind of time to draw again.