Job Gumshoe

Job "Gumbo" Gumshoe was the partner to Joseph Wahr in season 3. His past was never fully revealed, but he seemed to have a connexion to The Crisp, as illustrated by his knowledge of the Observers, Observation Box, and dreams.

Prime Universe
Gumbo, like all humanity, came from a shard of The Dog. In the prime universe, he discovered this fact after opening the Observation Box. He then sought to spread his knowledge by advising up-and-coming drug dealer Dylan Früh. Dylan took on the outlandish persona of The Dog, and assisted Gumbo in creating cryptic videos with mind-controlled patrons to help subconsciously awaken The Dog.

Redux Universe
In the redux universe, Gumbo stumbled onto the videos by accident, not remembering being a participant. He then found and recruited Joseph after seeing him on the channel in the season 3 trailer.

Prime
Gumbo becomes too ambitious in trying to spread his ideals, including getting the police involved, so Dylan has him killed.

Redux
Gumbo works with Joseph to find Dylan. He then travels with all three of them to Safka Erb, where he is shot dead by Dylan after he realizes Gumbo has a strong connexion to The Crisp. Though his Observers retained the knowledge and gifts he had been given.

Illuminating the Corner
It's seen that Gumbo's Observers are the only ones able to resist the control of The Dog, and actively fight against Dylan's spread of the Observation Box. It's also revealed that one of these Observers, keeps The Crisp with him (in the form of the apple painting).