Cool. I like Kar. The Akk Dogs seem overcosted for only 1 attack, even if they do have Viscious. I mean, compare them to the Massifs (which is kind of what I'm guessing you based them on).
And there's no point for the Akk Guard to have Bloodthirsty to start with, as it makes Kar's CE useless, lol. I definitely like Kar's CE though. Would be cool to have it grant Bloodthirsty to Fringe in general, not just the Korrunai, but I know you were going for flavor. I'd love to see the Bloodthirsty ability a bit more, and on better pieces than the CW Aqualish.
Cool ideas.