Polaris (ApSciPackrat)

Morgan's housemate. A hyper-intelligent rat with a liking for junk food, particularly gummi bears. Has the Aperture logo tattooed on his back legs.

Background
Test subject DX-23-Q, from the [REDACTED] project run by Doctor Anton Servarious during the [REDACTED]. While much of the experimentation was [REDACTED] huge success.

During a routine termination of the test subjects [REDACTED] Redemption Line [REDACTED] major malfunctions to the system [REDACTED] several accidents claimed the lives of [REDACTED] faulty wiring was thought to be the cause [REDACTED] found five days later, dead from dehydration [REDACTED] acid burns [REDACTED] self-Terminated with an electric bread-knife [REDACTED] broke his back falling from his desk while changing a lightbulb [REDACTED] the only survivor managed [REDACTED] severe blood loss [REDACTED] Doctor Servarious himself was never found.

After this, he found his way to vault, and found a sleeping test subject. Like any lab rat, he was struck with empathy for the sleeping test subject, and started gathering objects and food for her. When the test subject woke, she called him Polaris. The naming allowed him to leave his past behind him, and become something new. He took it upon himself to be her personal guardian and her closest friend, and has been ever since.

Personality
He can be a little on the selfish side, particularly when treats are concerned, but for the most part he is a highly-affectionate and caring individual. He is very attached to Morgan, and will not allow any harm to come to her if he can help it. For everyone else, he prefers to work with favors owed or rewards. He doesn't like androids or cores, any kind of medical procedure, or people picking him up by the tail.

Abilities
His increased intelligence as a result of Genetics' experimentation means he has an excellent memory, as well as the ability to read. His typing skills are sub-par, mostly because he gets too excited to press the keys properly. He also, like many of the genetically-modified creatures and machines in Aperture, has the ability to Converse: a kind of shared language that cannot be heard or understood by most humans. Also, as a laboratory animal, he never ever gets lost in a maze. His navigation skills are second to none. He has a strange compulsion to open locked doors wherever he finds them.