Professor Padraic Ratigan is the main antagonist of Disney's 1986 feature film The Great Mouse Detective,
Ratigan has a variety of henchmen that follow him, including his overweight pet cat, Felicia, Bill the Lizard, a small mouse named Bartholomew, and his right-hand man, a peg-legged bat named Fidget. Personality-wise, Ratigan is very charismatic, calm, and calculating, but can easily be sent into a violent rage at the mention of Basil or by the incompetence of his minions. He has a very dark, malicious sense of humor and an inflated ego.
Even though he is one, Ratigan detests, above all else, being refered to as a rat, preferring the description of "a big mouse," and fed Bartholomew to Felicia when Bartholomew calls him "the world's greatest rat" while intoxicated. He can easily be identified as a rat since he has 4 fingers and a thumb on each hand while all the other mice have 3 fingers. Also, the mice in the movie have much smaller, thinner tails than Ratigan, who has a long, fleshy tail. In the Basil of Baker Street book series, Ratigan's first name is revealed to be Padriac, and he is in fact, portrayed as a mouse.
Ratigan made small role on the battle while he became one of the Org's science group to build machinery that small but deadlier than it's appearenced.