Brain is one of Yogi's close friends and TC's gang and he appears to be a common assistant to Top Cat. Contrary to his name (which appears to have been given in jest or sarcasm), Brain is the dim-witted member of the alley gang, an orange cat with a violet T-Shirt with a black line. Brain is notorious for being unable to keep a secret and for his stuttering. He also seems to be in charge of the group's money (which they rarely have) and he runs up and down the road. Despite his apparent stupidity, he can sometimes say something brilliant, which TC instantly rephrases to make it sound like he said it. He is the youngest of the cats not counting Benny and is 22 years old.