Narti is probably the most psychologically attuned of all the Generals (in Narti's absence, Ezor attempts to mimic this -- her success rate is of varying degrees). So let's analyse this line-by-line.
There's the immediate emphatic placement on 'Voltron', first of all. As the saviour figure, much like that Lotor denounced in his prior speech:
Narti's assignment of Voltron's merit is kind of a two-way sword, I think. Because Narti both mocks Voltron's 'saviour complex' (through luring it out) and defeats Lotor's supposition that Voltron won't come to the Puigans aid through begging it (because Narti knows Lotor's ideals are a lie, better than any other General --
the language here is euphemistic; only Lotor and Narti know what 'speak' entails. Perhaps because Narti acts like a psychic sponge and is able to receive the transmission of Lotor's true intent; or perhaps because Narti has known Lotor long and well enough to parse his meaning. A bit odd that Lotor doesn't lay out his exact intention for the rest of the Generals...).
Next! 'Galrans'. So I think this is interesting, because the plural for Galra -- the race -- is Galra. 'Galrans' suggests multiple individuals. Basically, it's the manner in which the Generals colonise vs the manner in which regular militarised Galra colonise. Galrans vs Galra. Narti speaks from what she knows. (This one is a reach, but eh.)
Then, you know, 'we were defenceless', 'the Galra are too powerful' -- the Galra empire values strength above all, were Narti raised in one of its factions (the Druid faction), she would have internalised this belief. She's mocking the Puigans. Oh, and now she reverts to 'Galra' as a race, rather than 'Galrans' as individuals. Subtle purple supremacy.
Also! The 'we' pronoun! Again, distinctly satirical. Lotor and Acxa (in the second arc, at least) often fall back on the 'we' as well. Narti mocks the idea of unity.
And then 'Thank you, Princess' indicates Narti is capable of faking courtesy & has done her research. Contrary to some, like Ezor, who cannot distinguish from Paladin to Paladin ('She's always been sweet on that one with the flippity hair', 'Oh look Acxa, it's your favourite Paladin' -- RIGHT BUT WHAT'S HIS NAME???).
Narti only really uses a vessel when it is necessary; her speech is distinctly manipulative, and this style of speaking may be deliberately altered in order to sway those she needs to sway. Otherwise, Narti tends to communicate through Kova and his growls, or, contrarily, signs of fealty:
Narti does the salute (one) more times than everybody else. After Narti's death, nobody performs it. Also, they never say the accompanying words (vrepit sa), because of (I believe) both a half-belief in the oath's meaning, and solidarity (with Narti, who is mute). Narti uses the salute as shorthand for 'yes', but also as a sign of acquiescence to Lotor. Narti needs to reassure Lotor of her loyalty doubly so compared to the rest -- because, I'd wager, she a) sees through his pretensions and b) is powerful enough to decently displace him, both of which make her more dangerous than the rest. Also, there's a nice touch of ableism tacked onto Lotor's distrust, if we are to return to the question of *why* Narti works for him in the first place. Regardless of Narti's assurance of her loyalty, she is killed upon the first suspicion.
