It’s so funny he’s literally just Some Guy. We all saw the bell keeper and went crazy with theories he’s Hilda’s dad he’s Hilda’s uncle he’s not human no he’s just A Dude. A Fella, if you will. Some Fucker with autism.
He is quickly discovering that going from "bell keeper" to "art museum security" might not have been the promising career choice he'd previously thought
Hilda season 2: This mysterious man is a recluse in a hoodie who prefers to avoid social interaction. He's more fond of trolls than he is of most of the kids in Trolberg, just like Hilda. He dislikes Mayor Alberg out of a sense of distrust in response to having his knowledge on trolls undermined, just like Hilda. He likes cucumber sandwiches, just like Hilda. Much like Hilda, he wishes not to use bells to repel trolls and strives to change an oppressive system, even if that means breaking into places he's not supposed to be in. Did you notice that despite his reclusive nature and implicit dislike of children it doesn't take him long to connect with Hilda? Hilda never learns his name and only knows him by his title at the end of the season, much like Kaisa, whose name we only learned a season after her introduction.
Hilda season 3: This is Hilda's dad his name is Anders Whatshisfuck McGee and he sucks at everything. Hilda still doesn't know that other guy's name.
ACTUALLY WHAT THE FUCK THEY HAD HILDAS DAD BUMP INTO THE BELL KEEPER AND THE BLUE STREAK IN HIS HAIR IS GONE WTF WTF WTF WE NEVER EVEN GOT HIS NAME AAAAAAAAAA-