And that too.Issi will surely chop Galahad to pieces once she hears her brother was murdered by Galahad. And also, how comes Galahad let Lord Chancellor loose after he witnessed Galahad killing his son. Was Galahad not afraid that Lord Chancellor would spread more bullshit about him in the Order and thus make Galahad a bigger target of the Knights?
Oh absolutely, ending spoilers.
Galahad knows the Lord Chancellor will spread more shit, but he's willing to take that in order to maintain The Order's integrity and footing in the world. Think of it like Batman willing to take shit and cover up Harvey Dent's murderous rampage, for the greater good and so that the new criminal laws made in his name, are not repealled. Similarly such a massive betrayal and conspiracy in The Order by Lucan, the Knight Commander no less, not only jeopardises The Order's image well beyond Galahad's own betrayal, but also puts in to question The Lord Chancellor too, as he is Lucans father, and the very heart of the institute. Galahad realises The Order's role in the world is far too important and worth his own sacrifice.
Side note, I don't think the hooded guy is King Arthur, I feel he is the original Sir Bors. In the historical age old mythos, it is Galahad, Percival and Bors who find the Holy Grail. They are actually the most noble and qualified of the Knights, and I myself did find it weird Bors was never mentioned in any of the press as a main character. My guess is after they found the Grail, Bors was not happy with the way the institute changed, hence left to maintain control and vigilance elsewhere.
Side note, I don't think the hooded guy is King Arthur, I feel he is the original Sir Bors. In the historical age old mythos, it is Galahad, Percival and Bors who find the Holy Grail. They are actually the most noble and qualified of the Knights, and I myself did find it weird Bors was never mentioned in any of the press as a main character. My guess is after they found the Grail, Bors was not happy with the way the institute changed, hence left to maintain control and vigilance elsewhere.