Yea, but who's the one trying to slice Keitaro in half? As for playing games with Keitaro, you either didn't read the manga right or eyesight has diminished. Naru puts on an aggressive exterior because she has no experience with guys and when it comes down to it, she's very insecure. It's true that Motoko has grown throughout the series, but all that mushy stuff came much, much later when it was well established that Keitaro and Naru was an item... in that sense I feel a bit sorry for her.