Billy is a competent lawyer and very conservative guy. He's sexist and occasionally a good friend to some of his colleagues.
Billy grew up with Ally and they first kissed as kids. They were together in high school and she followed him to Harvard Law where they stayed together for a year until Billy decided to move to Michigan after having met Georgia while visiting the school there. He didn't tell Ally that, but used the importance of clerking in Michigan as a reason for the break-up. In 1996, Billy married Georgia. At his bachelor party, which was attended by Judge Dennis 'Happy' Boyle, there was a sex worker whom Billy slept with.