Not only is Kermit Griffin a computer genius and police detective, but he is also a former mercenary, and former CIA operative. Kermit drives a lime green Corvair convertible, that he affectionatley refers to as the Kermit-Mobile. He wears a suit and tie along with green lensed sunglasses. His choice gun is a Desert Eagle, and his mercenary instincts and reflexes are impeccable. Griffin has a sister Marylin, and at least one ex- wife. He enjoys eating Gummi-bears and surfing the net.

Detective Kermit Griffin wears dark green glasses and rarely leaves his computer. He also tends to wear white socks, white shirts, and dark suits with a tie. He has a private office that is loaded with computer equipment, disks, and a weapon to protect them. He has a sister named Marilyn (mentioned in "Out of the Woods" and "Quake!" and finally revealed in "Demons"). Kermit is also an uncle to Marilyn's two children. He has at least one ex-wife, who apparently sent him a "Dear John" letter posthumously (believing he'd been killed in Afghanistan). There are hints of a past for Kermit as well, and he has been known to warn people that he is "a dangerous person." Kermit smokes, eats gummy bears, and wears a pocket protector. He's not sure if he got his name from wearing green glasses day and night, or his voice. In "Sunday at the Museum with George," we learned that he knew Blaisdell before the force, and in fact learned how to take out an assailant without losing his sunglasses from Blaisdell. Kermit's weapon of choice is a Desert Eagle (not a Glock as originally thought), although he tends to prefer mounting his attacks from the PC. In "Rite of Passage" and "Plague," we learn more about Kermit's mercenary past, including the fact that he and Blaisdell worked together in Afghanistan. Kermit also appeared in "Manhunt," helping Peter to evade the Federal Marshalls, and in "Chinatown Murder Mystery." Kermit was apparently once in the arms business, legend has it that he never allows his adversaries to see his eyes, and he drives a lime-green Corvair convertible. In "Quake," we learned that Kermit joined the police force to escape into the bureaucracy. Clues about Kermit continue to be dropped from time to time. He also appeared in "Cruise Missiles," and once worked with the villain of that episode (Selenger, when he was with the CIA) and "Banker's Hours," which featured an old friend from his spy days, John Durham.