Kayura is pretty much the same in both versions: abrasive, a nuisance, an overly-powerful pest who either can't or won't comprehend anything beyond serving her master and making the 'big arrogant men' look bad. She is completely baffled by the idea of self-sacrifice for a friend's sake and the concept of teamwork is farther from her mind than it is from the Warlords'. Her American self is more inclined to sarcasm than her Japanese self, which gives her interaction with Rowen a weird, almost-flirting twist. She loses a lot of her personality when she takes up Loyalty, but by then it's more a relief than a loss. It is a shame we don't get to see more of her gentle, friendly side, though; that would mitigate a lot of her irritation-factor. She really falls under Mary-Sue classifications, right down to the tragic past and inexplicable introduction, not to mention the power-playing.
I'm still giggling. ;)
(Yes... I find Kayura annoying... So what? Emphasis made by me)
Taken
here.