Agent Smith is the agent from the Matrix, but now he is turned into pixel form, and he smiths various things. Even his description pays homage to the Matrix movie.
His description entails:
"Tell me, Mr. Anderson: what good is a forge if you're unable to smith?"
Smythical Special[]
Agent Smith's smythical special is the Clone Agent Attack, 2 clones of Agent Smith appear and do 50% of your current damage a couple times, and then disappear, it's unknown whether the clones can get a critical or not.