Who is the character Jimmy, John Wick's old friend, and how does he fit into the John Wick universe?

Jimmy, played by the actor Thomas Sadoski, is a brief but memorable character in the John Wick franchise. He appears in the first film as an old friend of John Wick, who works as a police officer. Jimmy is the first person John goes to for help after his house is invaded, and he is asked to clear up the scene of the crime. Although hesitant at first, Jimmy agrees to help John after seeing his determination.

Jimmy's character fits perfectly into the John Wick universe as he is one of the few people John can trust. Jimmy is one of the few people who are aware of what John does for a living and the world that he operates in. Jimmy's willingness to help John even when it means breaking the rules of his own job also shows his loyalty towards his old friend.

Jimmy's role might be small, but his presence in the franchise is significant as he provides a sense of comfort to John as he navigates his way through a world of assassins and treachery.