December

Third generation. One of the three identical triplets that appear to be five years old. Their weapons are Heckler & Koch MP5Ks, but they use their super strength more often. October, November, and December are very immature and, like August, always seem to be having fun. They think that their morbid job is a game, and are fixated on childish concerns. December has a habit of sleeping on the job.

(Source: Wikipedia)