Mao

Mao used to have a brother named Junior, whom he loved very, very much. Unfortunately, Junior went to the Bridge and Mao became very depressed. He stopped playing and withdrew into himself. Then one day the Food Lady brought Skeezix home. Mao keeps saying that he doesn't like the "little wite rat", but he has rediscovered the joys of snuggling. Mao also likes going outside, but he got grounded for a long time last year when he went out and stayed out all night. Mao is also the one who came up with the idea for marketing Mao and Rocky's Vishus Deer Repellent. This is only fitting, as Mao is the one who first told Skeezix about the vishus deer who eat juicy young cats.

Mao is the bestest bro,
Though he doesn't want the world to know.
The wite rat can snuggle
With nary a struggle.
Mao's protests are mostly for show.