Razmo is the shorter and stouter rat. He is a highly productive genius and mechanic, having invented the ratboard and being responsible for all mechanical and electrical issues. He is also forced to perform all chores as Rapido never lends a hand. This has led Razmo to become depressed, emotionally scarred and obsessive-compulsive. Razmo is also childish, sometimes speaking to a plush toy and wetting the bed. His interests include playing stringed bass, jazz, counting the cheese, inventing and making friends. In the original Rapido short, Razmo had a Deep South accent; the voice was changed to have a slight Brooklyn accent during production of Ratz. Oddly, Razmo is called 'Ratz' (as in the name of the show) on the blurb for the show in Sky programme guides.