- "I demand clarity! We've never made a correction in error! And that, Cha-Cha, is why I don't mess around with Ouija boards -- a one-way ticket to demonic possession!"
Hazel grew up an only child to stingy and neglectful parents who never got him anything, even though all he ever wanted was to pursue his passion for music. At some point, he joined the Temps Aeternalis as a hitman and became partners with Cha-Cha. His job is to keep the timeline safe and steady. He and his partner are supposed to ensure that everything will play out like it was meant to. Unfortunately for the timeline, both Hazel and his partner are hopelessly insane. Hazel is also a sucker for sugary treats. The duo of hitmen (who both wear cartoonish animal masks) are known for their love of delicacies, often taking time in-between their missions to feast on treats.
The 1980 Mission
When Hazel and Cha-Cha were dispatched on a mission to 1980 to acquire Number Five for his services, they instead found his brother Klaus, who they tried torturing into telling them where Five was. Klaus didn't know, but he gave the pair the codes to the country's arsenal of nuclear missiles, which his father was given by John F. Kennedy in 1963. Hazel gleefully activated, causing a timer to begin counting down to the apocalypse. Hazel then shot Klaus in the head, who was sent back from Heaven by God, who decided he didn't like him. Klaus then possessed Cha-Cha and shot Hazel in the head.
However, when Number Five and the Rumor traveled back in time and killed President Kennedy, the timeline was altered. Hazel and Cha-Cha were never dispatched on the mission to 1980, and were thus never killed by the Séance.
When Hazel was dispatched on a mission that took him and Cha-Cha to a past Christmas in the City, he took the opportunity to change his own personal timeline for the better, leaving a trombone for his younger self as a Christmas present once the man they were sent to kill was dead. It is unclear how this changed Hazel's timeline, if at all.