[Riku peers into the room behind Kairi--safe. He nods to himself, then waits as she fetches whatever it is she came back for.

Only then she's asking him how to dismiss the Keyblade.

Riku has to think about this for a long moment. It's always been a natural motion for him, something he's done without a thought. His explanation, when he speaks, is halting and disjointed.]

Well... I guess you just think about releasing it. Let go of it, and at the same time think about releasing it.

[He holds out his hand, summoning the changed Soul Eater back to it. This part is much easier, this part he knows how to explain.]

When you want it back, you just reach out and take it--you have to know and believe it'll be there for you to grasp.

[Fail explanation go!]