Well, it wasn't my intent to make them be disliked. Instead, it was my intent to play them straight. I imagined that they'd honestly believe that they were better than us, and that thinking - that firm belief - would show in how they acted. It's just that it's not out of malice or anything of the sort towards us humans. They just really do think they're better. On top of that, I also believe that they'd also want to be friendly and therefore want friends as well, but how they'd go about that wouldn't be normal. The killstealing for an example, I imagined was playful competition from their perspective, as they thoroughly expected you guys (the Nepleslians) to to try and do it back, as well as do your best to one-up them.
However, even though they mean well, that doesn't mean good things happen - most people who aren't Neko themselves, or understand them and how they think, would take it the wrong way. Which, I feel, is one of the reasons why there's been a long-running friction between Nepleslia and Yamatai. They're just plain different cultures with different norms, meaning that they're alien to each other. In the aside I'm doing with Shadow, "Which Tie?", you can see some of that - the difference extends as far as their own views of intimate relationships.
As for armor choices, if you decide to go with the Aggressor Warrior, I suggest the AOP instead. You're free to decide though. This also brings us to the Aggressor cap of 2 units too.