Ken and Kira in “Unfinished Business”

Ken

You're still stronger than the Fox. Remember that.

Kira

[anxiously] But I'm useless without a weapon. I'm useless to my friends.

Ken

You always have a weapon-- the most powerful weapon of all.

Kira

If you tap me on the forehead and say, "Your mind is your most powerful weapon," I'm going to scream.

Ken

[laughs] I wasn't going to tap you on the forehead. But... The sword is a gateway to the Fox. And the Fox is too dangerous. [He sighs] Your mind is a weapon, Kira. Trust yourself. You can still outfox the Fox.