Hazel is a hitman, whose job is to keep the timeline safe and steady. He and his partner Cha-Cha are supposed to stop anything that isn't supposed to happen from happening. They ensure that everything will play out like it was meant to.
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.
Hazel and Cha-Cha are trained hitmen who have carried out multiple murders. They live in and out of time, as they won't grow old.
When he was dispatched on a mission that took him and Cha-Cha to a past Christmas, he left a trombone for his younger self as a Christmas present.
The duo was murdered when the Séance, who they had kidnapped, possessed one of them and made him shoot the other, blowing his brains out.