[No, he's not going to let this go. He can feel the change start to come over her, and more importantly she' speaking more firmly when she speaks about leaving the Organization. And she left. Whatever else happened, when she found out the truth...]

Maybe what you did- I don't know what you did, but whatever you did, you did it because someone lied to you. You did it because they told you it was the right thing to do. You did it because you were trying to help, at least help Roxas and Axel. It's not your fault that Xemnas was a terrible person like that and he tried to make everyone do things that would hurt the worlds. You said it yourself, you left when you found out they lied to you. You were going to go help Sora, right?

[And he reaches for her hand this time, grasping it firmly to reassure her.]

You already proved it. When you have the opportunity to make your own choices, you choose to do the right thing, the thing that helps people. You're not a bad person, I can tell. I can feel it. Darkness exists in people, but that doesn't mean it has to be bad - just look at Riku, Riku's a great guy and he's got a lot of Darkness in himself and he knows how to use it for the better. You can't blame yourself for the past, otherwise you won't be able to go on and make things better.