Jacob Jeffrey "Jake" Peralta portrayed by Andy Samberg is the main protagonist of the show, and the only character besides Raymond Holt to appear in every episode. At the start of the series, he was a cocky and immature, but very talented and dedicated NYPD detective stationed in Brooklyn's 99th Precinct.
He was often the one coming up with precinct competitions and shenanigans and not taking anything except his cases seriously. He has, however, always cared deeply about his friends and is extremely loyal.
Throughout the series, due to his father-son relationship with Holt, and his partnership-turned-relationship with his now wife, Amy , Jake matured and turned into a very respectful and respectable person. In the series finale , he decides to retire from the NYPD and become a stay-at-home dad to his son Mac born in the season 7 finale, " Lights Out " so that Amy can focus on her career.
Peralta is a detective that has never been one to follow the rules too closely, frequently ignoring departmental guidelines and ignoring instructions from superior officers.
Perhaps because he has the best arrest record among his colleagues, he's been enabled - if not indulged - throughout his entire career.
