Brooklyn Nine-Nine Wiki

Arlo is Rosa Diaz’s dog.

Throughout the Series[]

Season Three[]

In 9 Days, Rosa originally got the dog as a replacement for Charles's own dog Jason who had died. Charles rejected Arlo, leaving him in Rosa's care. After caring him for only a day and a half, Rosa stated to the squad that if anything happened to him, she'd kill everyone in the Nine-Nine and then herself.

Season Five[]

In The Big House Pt. 1, Rosa asked Raymond Holt and Terry Jeffords to bring Arlo to Adrian Pimento's ranch in Argentina.

Season Seven[]

In Valloweaster, Rosa mentions Arlo when noting Cheddar's appearances in the precinct and points out she never brings Arlo. Jake doesn't know who she's referring to by the name Arlo.