This is an interesting god conceptually. He is the watchman of the gods in Norse mythology, and he serves as the keeper of the Bifrost (rainbow bridge) at the entrance to Asgard.
Here is a somewhat older rendering from Marvel Comics …
… and a more recent one.
I have lauded the Disney Marvel universe in my series, The Modern Pantheon (see black strip at left), and I mentioned then that I am intrigued to see how they develop his character further (perhaps in Thor: Ragnarok?). He is interpreted interestingly by Idris Elba, as can be seen in Thor, Thor: The Dark World, and (briefly) Avengers: Age of Ultron.
Next week: back to Olympus (and beyond).