The Dark Magician, as they have been dubbed by the media (they prefer The Lord Protector of the Commonwealth of Great Britain, thank you very much), is known for repeatedly trying to kidnap and impersonate the Prime Minister, a habit dating back to twelve years ago. The first attempt was thwarted by three children from Majesty's, and the second was during the Triad Creation Tourney. It was during this second attempt that it was revealed that the Dark Magician had been attending Majesty's in the guise of a student after their first attempt failed. The Dark Magician escaped capture and has since been attempting to replace and impersonate multiple Prime Ministers, with the occasional side of other shenanigans mostly centered around gaining power.

The Dark Magician is a master of disguise, and no one knows their true appearance. They could be anyone, and it's not uncommon for politicians to claim that they were being impersonated by the Dark Magician when they get into trouble. There are lots of online conspiracies trying to link them to different things. They do have some online fans and would-be followers, mostly kids who are in it for the lols or don't know any better. Patriotic and nationalistic followers also exist, because the Lord Protector Loves Britain the Very Most.

Nine years ago, the Dark Magician's schemes suddenly started getting thwarted on a very regular basis by a mysterious costumed figure. Said figure ended up being assumed to be some sort of vigilante/protector and was dubbed the Dark Knight by the media. (The Dark Magician/Lord Protector was not amused, because the Dark Knight hadn’t really been knighted. You can’t call yourself a knight when you haven’t been knighted.) Their true identity still remains unknown, but they have legions of fans online, many of which are super into the masked man thing.

(It goes without saying that fans of the Dark Magician and the Dark Knight enjoy speculating on the true appearance of their respective idols.)

At some point thereafter, some of the Dark Knight’s and the Dark Magician’s bickering was caught on camera and it was revealed that the Dark Knight also wants to take over Britain. Their constant thwarting is because the Dark Magician is a rival and not because they’re trying to protect everyone. The media immediately dubbed this the Dark Rivalry and it’s very useful for slow news days. It’s also gained its own share of specific fans who enjoy messy drama. (And also, there are shippers. But then there are always shippers.)