This might be an odd one, but I can relate to Lou, the young dog in the movie Cats And Dogs. He reminds me of me when I started high school; childlike and not taking my schoolwork seriously, like Lou was a bouncing puppy and wasn't really taking his secret agent thing seriously or not quite understanding. Lou's friend, Butch, that he'd partnered with, reminds me of the friend I had on and off in the first two years of high school, she was quite no-nonsense and took her schoolwork seriously and was sometimes patronising to me, trying to snap me out of my goofy, unprofessional manner. Butch even looked a bit like my friend, with the facial expressions, sort of like kind-looking but a bit impatient on the inside.
EDIT: I'm aware that Lou did not have any autistic traits but that doesn't mean I can't relate to him a bit.