Agent

The Agent is a major villain in Bolt. He works under the Director

Role in film
His job, basically, is to manipulate Penny to keep her working for the TV show, no matter what. He also tries to minimize Penny's feelings for Bolt wherever possible. While he claims the he would trade Penny for his daughter in a heartbeat, he really doesn't care about Penny or her feelings at all, and proves this by bringing in another dog to play Bolt when he goes missing - and then trying to persuade her that it's the real Bolt. He is the first person to find out when Bolt returns, as the dog accidentally trips him. After the fire, he tells Penny's mother that he will make her injuries a big thing (that would, ultimately, earn him more money), which gets him thrown out of the ambulance.