Or it's just that she is a woman that refuses to accept that the person she once loved is gone.

Eh, I don't think any member of the Ebon Blade has any true loyalty to the Alliance or Horde. Them partaking in any way over the conflict at hand wouldn't make any sense.

Eh? Thassarian seems loyal to the Alliance.

He says the following for an Alliance Quest:
"All I ever wished was to serve my king once again. For humanity, against a common enemy. Instead, I find that our numbers have been infiltrated by cultist scum.... and all of the signs point to Naxxanar as the origin of this rot. "

Isn't that the PCs, though?

Koltira and Thassarian do indeed seem to be ambassadors and advisers more than real members of the Alliance and Horde. They still act like members of the Ebon Blade, knowing what has to be done and ignoring the petty fighting between the Alliance and Horde.

Also, while Koltira never has a falling out with the Horde of sorts, Thassarian definitely does with his quest-line in Borean.

Tirion's Gambit is really all the evidence you need that they keep their loyalty to the Ebon Blade as priority over faction loyalty, though.

As for the BE model in warrior armor and the human model in blue-themed DK starting armor, I don't believe either to be significant NPCs. When they revamp important NPCs they tend to leave them with similar hairstyle and features. Also, as mentioned before, both Thassarian and Koltira already had DK skins.

The BE is most likely a San'layn, and the human is most likely a random Ebon Blade NPC in ICC (he wears the same armor as the Ebon Blade Knights do on the quest Tirion's Gambit - Quest - World of Warcraft).

edit:

This is something I've noticed as well. Maybe it wasn't intended, but you can tell that the writers had a lot of fun with the Ebon Blade NPCs, as even some of the less important ones (Stefan Vadu, Lord-Commander Arete) have more interesting and fun personalities than a lot of other quest and major lore NPCs.

Their quests tend to be a lot more memorable as well. Jumping around Malykriss as a geist for Vereth the Cunning's quests was probably one of the best things in Icecrown.

On the other hand, I could just be very biased.

Well, to the point about Burning Legion, it seems Icecrown Raid will be devoid of anything Scarlet Crusade related or BL related. That is a bit dissapointing especially after Mal'Ganis's proclamation:

Actually, I'd save my disappointment until after the end cinematic for the fight. For all we know, the expansion could end with the Lich King's essence dissipating away through the cracks in the citadel's ceiling, defeated but not destroyed, with Mal'Ganis watching from afar, confident in the knowledge that he could finish what we couldn't, but content with letting us fight a new Lich King a generation from now.

Okay, there's no chance in hell that will happen, but I assume the devs' statement that we won't exactly destroy the Lich King still stands, and that from a lore perspective, the current situation would greatly favor the Legion by softening the world for some upcoming invasion.

Actually, I think pretty much all the outcomes for the Lich King story favor the Legion in the long run.

- Arthas kills every living thing in the world, his armies reach their peak, and the Legion an invade, with the advantage that demons can't really bolster the Scourge any further since they can't be killed, and they can just pop back in waves.

- We defeat the Lich King soundly, but with no real enemies left, we turn on each other and become easy prey for a few, massive, simultaneously coordinated attacks on the major factions

- We narrowly defeat the Lich King and the Kegion attacks us before we can rebuild

And you are ignoring that, since this is yet to happen and furthered by Deathwing/Old Gods, the Legion has nothing to do with it and hence no knowledge of these upcoming events.

It's an intended oversight on my part; the Legion doesn't know Deathwing will suddenly make his move; or, at least, it didn't know it the moment Mal'Ganis made those threats. At that point, those are the only foreseeable outcomes and they all favor the Legion. And let's face it, it wouldn't really matter who the super-villain du jour is, as long as an eventual demon invasion catches us during our war effort or immediately after it, when we're recovering.

Edit: Slow... really slow

Do have the full 12 encounters, already? If not, Mal'ganis is still a possibility. His threat (Blizzard's) seemed serious enough that it wasn't empty. Perhaps after we fight...well, any boss, but I'll suggest the Cult of the Damned leader, just for kicks and the presence of the Ashen Verdict forces, he and a band of Scarlet Onslaught loonies (and I mean it, make them a bare-chested, two-handed weapons wielding, berseking lot) invade the citadel. The Ashens fight the goons and we have to take on the Dreadlord.

Not that I fancy this possibility too much. I'm not exactly a demon fan, and Jaraxxus was enough of a demonic intrusion into an undead environment for me.

On the next demonic invasion, I don't think (and hope not) Blizzard will repeat itself in almost justaposing events. The Cataclysm will take place soon after we beat Arthas, while we're still mourning Saurfang's death (sorry :p) and its goal is precisely to catch us at the worst possible moment. But it gets tiring, all these villains one after another. Let the world flourish for a bit (albeit probably under a war between Horde and Alliance). I love the sound of thriving civilizations being Chaos Bolted.

Found another NPC: Aquanos with an interesting spell: Aquanos Laundry

The Model is water revenant, skin is 'RevenantwaterBlue'. Since this is definitely a "pure" water-based elemental (and not "rusty", "black" or "green") I'd say it's related to the new Vault boss, or even the boss itself (yes I know sigrie doesn't state "boss", but who knows)