<Dl> <Dd> Judy is a likeable and outgoing man with a talent for staying one step ahead of Peralta, who considers him his nemesis . Initially contemptuous of Peralta, Judy gains respect for him and by season 3 considers him a friend . Judy is also very (mainly sexually) attracted to Diaz . </Dd> </Dl> <Dd> Judy is a likeable and outgoing man with a talent for staying one step ahead of Peralta, who considers him his nemesis . Initially contemptuous of Peralta, Judy gains respect for him and by season 3 considers him a friend . Judy is also very (mainly sexually) attracted to Diaz . </Dd> <Ul> <Li> Stephen Root as Lynn Boyle, Charles's father who engages in a romantic encounter with Gina's mother, Darlene, and eventually marries her . He is a retired florist and is known to get overly eager and take big risks like his son . </Li> <Li> Sandra Bernhard as Darlene Linetti, Gina's mother, who engages in a romantic encounter with Charles's father, Lynn, and eventually marries him . She is a travel agent and shares her daughter's confidence and superstitions . </Li> <Li> Marilu Henner as Vivian Ludley, a food author who becomes romantically involved with Boyle . In "Full Boyle", she and Boyle become engaged, until she breaks it off in "Charges and Specs" when she wants to move to Canada and Boyle is not willing to do so . </Li> <Li> Bradley Whitford as Captain Roger Peralta, Jake's absentee father and commercial airline pilot . He left his family when Jake was at a young age and has cheated on his wife with multiple women . He eventually attempts to reconcile with Jake and Karen even when the latter knew about an affair with their neighbor . In "Two Turkeys" it's revealed that besides Jake he has three daughters with other women and an unknown amount of other sons . </Li> <Li> Katey Sagal as Karen Peralta, Jake's mother . She is a public school art teacher who worked hard to raise Jake as a single mother after Roger left the family . Despite their past, Karen eventually begins dating Roger again much to Jake's discomfort . </Li> <Li> Merrin Dungey as Sharon Jeffords, Terry's wife . She is kind and supportive towards her husband and his profession, but can occasionally be stubborn and doesn't like being lied to . She is often seen taking care of their twin daughters Cagney and Lacey and eventually gives birth to their third daughter Ava on the show . </Li> <Li> Jamal Duff as Zeke, Sergeant Jeffords' brother - in - law . Zeke often taunts Terry for his shorter height and profession, leaving the latter to turn to Captain Holt for help . </Li> <Li> Jimmy Smits as Victor Santiago, Amy's father . He is a retired cop and is shown to be overly organized and competitive like his daughter . He initially doesn't approve of Amy's relationship with Jake, but changes his mind and respects his daughter's decision after the two solve one of Victor's older cases . </Li> <Li> Bertila Damas as Camila Santiago, Amy's mother . Like her daughter, she can occasionally be over-controlling and competitive . </Li> <Li> Nick Cannon as Marcus, Holt's nephew, who begins a romantic relationship with Detective Rosa Diaz in season 2 . Rosa breaks up with him in season 3 due to him being too emotional for her . </Li> <Li> Niecy Nash as Debbie, Holt's sister . Unlike her brother, she tends to be loud and overdramatic about her life, making it difficult for Holt to be around her . </Li> <Li> Mary Lynn Rajskub as Genevieve Mirren - Carter, an art curator who was initially framed for stealing her own paintings for the insurance money . She was eventually vindicated by Charles, and begins dating him over similar interests . Genevieve and Charles adopted a son, Nicolaj, on whom he dotes . </Li> <Li> L. Scott Caldwell as Laverne, Holt's mother and a federal judge . Holt refers to her as "Your Honor". </Li> <Li> Danny Trejo as Oscar Diaz, Rosa's father . He's intimidating and tough like his daughter, though Rosa mentioned in an earlier episode that he was a teacher . When Rosa comes out as bisexual, he doesn't take it well at first, but manages to accept his daughter for who she is . </Li> <Li> Olga Merediz as Julia Diaz, Rosa's mother . Unlike her husband, she still hasn't fully accepted her daughter's bisexuality . </Li> <Li> Nasim Pedrad as Katie Peralta, Jake's half - sister on his father's side as a result of Roger's affairs . She lives in Dallas, Texas and has a chaotic personality that Jake and Amy have a hard time handling . </Li> <Li> Sarah Baker as Kylie, Amy's best friend . </Li> </Ul> <Li> Stephen Root as Lynn Boyle, Charles's father who engages in a romantic encounter with Gina's mother, Darlene, and eventually marries her . He is a retired florist and is known to get overly eager and take big risks like his son . </Li>

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