Yeah like Warlock said, the reason why we don't have characters who represent a Dragoon or a Monk are because Dragoons are solely from Ishgard and Monks are from Ala Mhigo. We know Ala Mhigans have their own unit within the Immortal Flames, they might have been represented at the Battle of Cartaneau Flats. Widargelt is the only Monk we know that has escaped from Ala Mhigo, if Monks were represented in the fights I'd say they would be on the Imperial side, since the VIIth Legion was mostly made from Ala Mhigans that they captured and kids they brainwashed.

About Sirens, even in old Greek legends the Sirens could look like women to lure the sailors to their deaths. We can assume that our FF versions of Sirens are similar, Miqo-style. As for the Titan video, there should be a similar video of the "Titan Stronghold" which contains a CS that has 3 NPCs (unnamed?) in it, 2 with glowing staves and 1 with a bow. I'd assume those are the characters that the voices belong to. Kinda sucks that they had Titan all planned out, I would like to know the story myself, I'm sure there's a completely different story for Titan in 2.0. Either way I'm sure 1.0 and 2.0 Titan and Leviathan involved The Company of Heroes, can't wait to meet them.

I have not been able to find a female midlander that shares the combination of charcoal hair and red eyes characteristic of Fye and Dunstan.
You can bet I'll be keeping my eyes peeled in ARR.
Yeah this one has to be found still to set in stone the theory of the Ascilia>Minfilia Khrimm>Hermit
I think they're pretty set in stone even without this. Let's not forget there's 1 in each of the City state scenarios. I'm sure they will pop up again in 2.0 and even if they don't (we know Minfilia will be around) because they basically want to 'scrap' the storyline. We all will atleast know how things got to where they are. We'll know the REAL story.