Blue-Haired Lawyer

The Blue-Haired Lawyer, voiced by Dan Castellaneta, is Springfield's most prominent lawyer known for his pasty face (he is sometimes called the “pasty faced lawyer”, blue hair, and nasal New York accent.

Other Jobs
He also occasionally appears to serve as a prosecutor. In one episode, he worked for Luvum & Burnham.

Differences from other lawyers in Springfield
Unlike Lionel Hutz or Gil, “Blue-Hair” is a competent and accredited, though not necessarily ethical, lawyer. He has served as Burns’ head lawyer, and is known to be Mr. Burns’ best and most cunning lawyer, helping him out with threats of the Power Plant closing down and of Burns losing his money.

Governmental Powers
He is a member of the Springfield Republican Party.

Rivilarly with The Simpsons
His clients tend to be antagonists of the Simpsons but there have been exceptions, such as Bart hiring him to get himself emancipated. He apparently gets frustrated with Homer occasionally.

Creation
Writers Al Jean and Mike Reiss have both stated on the DVD commentaries that the voice is based on McCarthy-era lawyer Roy Cohn, and animator Jim Reardon has said that he is designed to look like character actor Charles Lane.