Hitman

The Hitman is a fast melee enemy and one of the three regular enemy types in King's Castle. It moves quickly enough to close on a player far faster than the King's Guard, then attacks directly once in melee range.

That speed makes it the most dangerous of the three to a player trying to keep their distance, and it commonly appears alongside the other enemies, where its mobility is hard to avoid while also dealing with a Guard and an Elementalist. Several Hitmen attacking at once are much harder to handle than one.