A lot of good stuff here.
That's my name, so feel free.
Consider the Gatekeepers name a little more literally. In Cold Days Mab will close off Winter. Right now I'm playing with the idea that the Gatekeeper was the man who made that happen, and that the Outer Gates control it.
I am thinking that the Outer Gates are a Swiss Army Knife kind of a thing. Letting the Gatekeeper look for and find whatever, kind of a super LC. The Gatekeeper is the guy who can go anywhere, see anything, and be in the right place at the right time.
In Turn Coat he puts the magic scan on Harry and sees the connection to Demonreach. He knows Harry's location well enough to open a portal near him, multiple times. He sees Black Magic in Chicago. Just kinda noodling the idea at the moment. Odin and him share a lot in common.
I like that. The Gate somehow allows him to see and open ways in a manner that he wouldn't be able to otherwise. He's also probably just pretty good at opening ways regardless.
They are but I don't think they are all the same colors, also Jim has made the point of describe it
over several books. He never talks about the colors of Eb's robes or the Merlin for example.
I'll have to pay more attention, but isn't that because Rashid often appears as an unknown figure who then Harry realizes is Rashid?
We know that the Gatekeeper is the oldest wizard in the council. Would it even be possible for him to be a wizard with an immortal mantle? I liked Salusen's idea about Heimdall.
That wouldn't be too different than what Odin is. He was a god, but kind of isn't because he stays on earth making him mortal, so he picked up the Kringle mantle to make himself immortal. I really don't see how a mortal Odin who takes up a fairy mantle to make himself immortal is all that different from a mortal wizard who takes up an immortal mantle (of any kind) for the same reasons. One of the reasons I don't think it's too different is because of something Patrick Rothfuss said about how there are three prototypical wizards: Moses, Odin, and Merlin. (It might of been Moses, Gandalf, and one of the others, but since Gandalf is based off of Odin, it doesn't really matter to my point, i.e., Odin is very wizardlike, so not much difference between immortal wizard and Odin).