Fark is generally an aloof robot, although he was programmed that way to get Spark off his trail (though it ended up doing the opposite). He's firmly on the side of good, however.

In Spark the Electric Jester 2, he's more emotional, displaying regret when he finds out he was created by Freom.

He is rather stoic and curt, only saying what needs to be said. He often avoids answering questions to avoid a bad outcome. He can have his moments of anger, such as any meeting with E.J. .