Kevin Ryman was an officer of the Raccoon City Police Department. He possesses superior athletic abilities  and is an outstanding marksman. An all-around good guy, he is a dyed-in-the-wool optimist who doesn't dwell on petty matters. Even though Kevin's very cheery, his quote above relates to the fact that he can be very impatient sometimes.
On September 24, 1998, the t-Virus that had plagued Raccoon City and the Arklay Mountains had reached critical levels. The local police force became aware of the situation and prepared a citywide evacuation. A roadblock to prevent an invasion at J's Bar and the surrounding businesses would be assembled too late, which ultimately led to Will, the working bartender, being assaulted and bitten by an invading zombie, which forced the panicked patrons, which included Kevin, to flee before the bar was overrun.
Some time later, Kevin would reach the Raccoon Police Department with the hope of reuniting with his fellow police officers. With the majority of the officers dead, infected, or stranded elsewhere, only five of his fellow officers had managed to avoid similar fates. After cooperating with the other survivors to aid in securing their safe passage out of the police station, Kevin, his surviving J's Bar cohorts, and Rita managed to escape in a police van as the police department was being overrun by the undead.
After the Raccoon City Incident, Kevin is seen talking to someone on a gas station payphone. He says that he has a fresh start with a new job in Miami and compliments the weather, saying that it should be fun. He then jumps on his Motorbike and rides toward the horizon.