Henry was born in Vermont. Both of his parents were fisherpeople and he started fishing at a young age. He learned to love it like his parents and he made a lot of friends growing up thanks to his kind demeanor.

As soon as he was old enough he started going with his parents on their fishing vessel, staying out at sea for months at a time. It was perfect. When his parents retired Henry apprenticed to a different fishing vessel and then spent his time alternating between fishing at sea and working the docks.
Upon learning about the Devil's Hole Pupfish's critically endangered status, Henry was devastated. How could he help those beautiful little fish?
He began to frequent the Devil's Hole even in summer, the heat apparently not affecting him at all. He killed his first person on accident while visiting the Devil's Hole one day. Someone was defiling the Devil's Hole for views and Henry became enraged. He yelled at the person, who ignored him in favor of content. Henry threw a rock at the person and it hit their head, causing massive blood loss. Thankfully they fell back, away from the Hole. As they lay gasping for breath, Henry came over and finished them off.
After this Henry researched more endangered fish and sea life in general and he made it his mission to kill as many people doing them harm as possible. Once he got the taste for blood, however, he would kill random people on beaches as well.
His mask is styled after the Devil's Hole Pupfish.