Barry

Barry, formerly Dogue, is a virtual dog that exists within Oz.

Description
Within the virtual world, Barry appears as an overweight brown dog with a jewelled collar that initially read "Dogue" on it. Despite being a program, Barry acts like a regular dog with a lazy personality, albeit with the ability to talk thanks to Nia's alterations.

A Trick of Light
Cameron Ackerson initially created Barry as a gift for Nia, and she programmed it to speak. When Cameron made to pass through Nia's entrance into Oz in search for her, Barry automatically told Cameron that it was not his door, apparently attempting to dissuade him from snooping. Cameron responded by threatening to delete him and replace him with "a thousand guinea pigs", before stepping through anyway.

Later, Nia returned to the space where Barry existed, but he did not recognize her after how warped she had become since departing the Inventor's ship. When Nia took up full time residence in Oz, she renamed the dog from "Dogue" to "Barry", in honor of the Inventor's alias "Batshit Barry", who she regarded as her Father.