What is Napoleon’s role as a character in the book

One of the leaders among the pigs, Napoleon is a “large, rather fierce-looking Berkshire boar” that is up for sale. He is the only Berkshire boar on the farm. He is “not much of a talker” and has “a reputation for getting his own way” (35). Napoleon expels Snowball from the farm and takes over. He modifies his opinions and policies and rewrites history continually to benefit the pigs. Napoleon awards special privileges to the pigs and especially to himself. For example, he dines on Mr. Jones’s fine china, wears Mr. Jones’s dress clothes, and smokes a pipe.