: He's definately Human, and not a berserk. His ambition to
: join the Heron Guard probably means he's a warrior.
: What made people think archer?
As Forrest says, because archers are the only units common to all levels he's on. The counterargument is that he could be another grunt or a commanding officer who's near the action but offscreen--but this doesn't seem too convincing to me, since we've got levels like "Murder of Crows" and "Limbs, Heads..." where there's a small and concentrated Light force and little chance for there to be any offscreen allies.
There are other minor scraps of evidence in favor of his being an archer. The narrator, or one of his cellmates, recognizes Phelot in the "Murder of Crows" pregame--then the game starts and we see Bowmen talking about him. Also, while the narrator is never seen to give orders to anyone, he's considered important enough, and likely to live long enough, that he's given Garrick's journal to keep. This is consistent with him not being an actual commissioned officer, but being slightly above the average grunt. GURPS confirms that Bowmen receive better treatment and survive longer than do Warriors.
I don't think it's an issue that Heron Guards are melee units--GURPS stresses that applicants aren't expected to have much in the way of hand-to-hand skills. They have centuries to learn swordsmanship--what they must possess from the beginning is determination and the desire to learn. And, as far as we know, the Imperial Bowmen haven't been reinstated yet, so that wouldn't be an option for the narrator.
In an interesting but completely unrelated sidenote, GURPS says that all Legionnaires are NCOs and outrank other military units. So Zerks and Dwarves--except the heroes and Pathfinders and so forth--have to obey Warriors and Bowmen.
--SiliconDream