It’s Merlin! 
We had one correct guess (out of two 
), but as I was a little worried might happen, things got muddy because of the license I had to take with the abilities for gameplay reasons. While (at least as far as I know from my research) Merlin never possessed the Grail or Calesvol’s (more commonly known as Excalibur) scabbard in mythology, for his role in Demon I assumed he was able to track them down (since he had guided heroes to them in the past) and put their powers to use for…. well, for purposes that will be revealed in the future. 
ShinQuickMan, I’d be curious to know: what about his abilities seemed in conflict with the character, if it was more than the Grail/Calesvol link I described? The fun part of studying mythology for major characters is that there’s a metric ton of material, so it’s entirely possible I missed something myself. Lemme know what you were thinking in the comments, or on the forum if you prefer.
As for progress, I’m continuing on with designing abilities: the new heroes and the minions are done, so it’s on to the unique demons. I’d originally planned to do sprites next and I may still, but I also may implement the abilities first instead, we’ll see how I’m feeling about it once I finish the ability design. Either one is progress, so it won’t matter from a release schedule point of view which I do first.
Wow, I would have never guessed Merlin, considering the fact that Merlin is supposed to be a half-demon cambion that directly conflicts with the “Holy Prophet” skill. If anything, I would have guessed Galahad because of his direct role in seeking the Holy Grail, and his status as the chosen one of God in the King Arthur mythos.
Yeah, Merlin was a complicated fellow. The half-demon stuff is definitely there, but the holy prophet business is also definitely there. Here’s one reference for that part: https://www.ancient.eu/Merlin/
I’ll quote one of the relevant bits from the link here: “Merlin was later featured as the central character of the Merlin by Robert de Boron (12th century CE) who cast him as a Christian prophet, and this depiction, with some variation, would continue in the Vulgate Cycle (1215-1235 CE) and the Post-Vulgate Cycle (c. 1240-1250 CE) to influence Malory’s final characterization of the seer.” The prophecies he was connected with in that way were in part those about the Holy Grail.
Truth be told, I’ve never studied much on Merlin’s origins for a long time. Could be the sources I’ve read from that time (books on legends, including Arthuric legends, though I don’t recall the titles) never mentioned his baptism (and thus, his magic through divinity), or that I missed it entirely. Like Ramen above, I was led to assume Merlin’s unnatural origins were strictly the source of his powers. Guess I way off!
I wouldn’t say “way off”
There’s a ton of info about myths as major as this one; I’m sure I don’t know all of it myself either. Major mythological figures like Merlin also tend to have some conflicting elements, which can muddy the waters a bit.