Yeah, here's the thing basically (although it was years ago so maybe I forgot smthg) :
- There's a light/dark alignment meter. Keeps track of your choice and is used to unlock force powers depending on your alignment. Maybe used in interactions here and there as well. This was in Kotor I and Kotor II used this too.
- On top of that, and tied with it is the influence system. It's a bit more obscure as iirc you can't see any gauge or number anywhere on your companions to know if you have a lot of influence (either positive or negative, since losing influence matters as well).
The way it works is : your character is either +X% light or +X% dark. If you influence a companion a lot, he'll be +Y% your alignment. If you lose a tonne of influence, he'll be -Y% your alignement (or +Y% the opposite, if you prefer).
Basically, Y is X*influence. So if you're a full light side jedi with half max influence on Atton, he'll be half way towards the light side. If you have - (half max) influence towards him, he'll be half way towards the dark side, getting further from you.
This is used at the end of the game to determine if you can and want to train little padawans or little sith apprentices, basically. I think the game has a total of 4 companions that are sensible to the force.
For Kreia, as you say, her meter either doesn't move at all or barely does so (I think it doesn't but I'm not sure), and she remains in the middle until the end. However, and that's where I'm not sure and am asking MCA, Kreia has a lot of dialogues, but they're extremely asymetrical regarding the consequences of your choices during these (or during the game, she and other companions also react in terms of influence towards your choices obv). In the end, you have like 5 more occasions to lose influence with her than to win some. And I think I told myself back then, close to the end of the game "hey whenever I win influence, it's either neutral or dark side stuff". She also clearly despises violence and cruelty, which yet belong to the dark side, but I guess don't fit her vision of the force (which is also rather dark side oriented).
The game is all in nuances like that. I wouldn't say like others that Kotor II is grey, or that his characters are grey, in relation to the light/dark opposition. But the light and dark aspects of the force are greatly nuanced. And Kreia is a character which represents this in a very cool way.
I think there's also a misunderstanding about her being grey on the light/dark meter. I don't think she's grey, I think she's just concealing her affinity with the force for story reasons.
Which is why I proposed this theory yeah.
It's not just this observation, it's the fact that it really mirrors the story, which even though it's an old game I don't want to spoil too much details about.
ps: needless to add, she's literally there at the beginning to (re)train you as a force user. So there's that as well. She's the master in this relationship.
ps2: now that I'm recollecting memories. I think the idea I had was this :
- she's influencing you to serve her purpose
- she's purposefully trying to influence you in a way that severes any bond you could have with either the light side force users or her enemies from the dark sides
- she's a manipulating bitch in a cool way, as she doesn't necessarily believe the shit she teaches you, or she does but in a twisted way that benefits her agenda (which is dark side oriented) so during the whole game you think she's a grey jedi telling you about how it's better to be balanced and shit, when all she really wants is someone who'll be just as predisposed to confront both jedis and siths.
But that needs confirmation. Plus I don't remember the details of the story, I'll have to replay through that. The game being unfinished even with the restoration mod doesn't help as well.