Shae is tricky to classify with the standard DnD alignment system, but as everyone else has said, it all depends on the character's point of view and everyone else's point of view, and Eve being very much painted in shades of grey makes things blurry.
This. In reality, Bacch is probably Neutral Evil. From a random site with a fairly in-depth description of the various alignments, some of the things that match with Bacch very well despite what he may think of himself:
Natural forces which are meant to cull out the weak and stupid are artificially suppressed by so-called good, and the fittest are wrongfully held back, so whatever means are expedient can be used by the powerful to gain and maintain their dominance, without concern for anything.
This fits with his philosophies on capsuleers vs non-capsuleers. To Bacch non-capsuleers are an inferior race, much as
Homo Erectus are to humans in modern evolutionary terms. Those capsuleers that do not acknowledge their own innate abilities and superiority are fools that need liberating, and the only effective way of liberating them is to ruthlessly demonstrate to them the power of those who embrace their full potentials and rise above the petty squabbles of nations that are merely tribes of non-podder refuse.
Their only interest is in getting ahead. If there is a quick and easy way to gain a profit, whether it be legal, questionable, or obviously illegal, they take advantage of it. Although neutral evil characters do not have the every-man-for-himself attitude of chaotic characters, they have no qualms about betraying their friends and companions for personal gain. They typically base their allegiance on power and money, which makes them quite receptive to bribes.
This bit is not entirely true. While Bacch has absolutely no qualms stealing, spying, scamming, or otherwise betraying people's trust, he is also fiercely loyal to his corporation and would not do anything that might damage Stimulus' mission and message of freedom. That said, his reputation is such that over time he has been marginalized somewhat in the leadership of the organization insofar as its role inside the alliance is concerned, and while this has not bothered him, it has solidified his feelings that the other organizations flying with Stimulus are akin to mercenaries--they are pilots that may or may not embrace the Stimulus philosophy, but they are effective pilots that serve to deliver the message in a cluster where it becomes harder and harder for smaller groups to make an impact.
So in a sense, if you take that paragraph and change the "I" to "Stimulus," it works. That said, there are some friends he would not betray (Veto, Eternal Rapture when it still existed, for instance, a very small group of individuals here and there) under any circumstances. And others he would have no problem betraying for the right price (Viper Shizzle, for instance).
...natural and man-made forces, if allowed to take their course, weed out the weak and useless in society. The deserving should take advantage of this condition to further their own goals by any means possible, especially to destroy weaklings who put forward "good" actions to promote the well being of all, which is just an excuse used to deny the deserving their due. To the neutral evil being, life is of no value, for those who cannot take advantage of their superiority don't deserve it, and they'll only interfere with the rightful pursuits of those who do.
This sums it up almost perfectly, actually.
I should point out that Bacch does not see himself as evil or a villain, but simply as driven and ruthless in his methodology. In fact in general I think that the notion that any persona sees themselves as evil for the sake of evil is absolutely silly. Those that are evil are generally simply out for themselves with little or no concern for any other, or are so ruthless in pursuing their goals that there is room for no concern for the repercussions of pursuing them.