Well. As long as you continue your training, I'm confident you'll have little difficulty.

[He impresses her, and she's not afraid to say as much in all honesty. It will be interesting to see how much more he continues to improve.]

--Oh, speaking of which. I meant to ask you about your weapon.

[Rukia points at the keyblade he bears.]

I can understand why it has the name it does, but why is it a key to begin with? What does it unlock?