[You see this tensing, and the looking away? Don't think he didn't consider it before - stepping in on his own, and dealing with the 'problem' himself. But at the time...] I had a facade to maintain. Xigbar was... much further down the path of being a proper vessel than the one I remember seeing here last. Because of that, he was suspicious of any behavior that indicated that my world's version of you was more like me. I... he felt it best to maintain appearances, and act as Xehanort would. It would've looked suspicious, if I had let not only traitors, but... 'useless tools' continue to exist.

[There is so much distaste for that line of thinking, and for having to let those events run their course, in his tone. Even though he isn't looking directly at Xemnas anymore, there is guilt showing itself in his expression.] The orders were to investigate, not eliminate. I can only make assumptions on what exactly occurred - again, his report on the deaths of Vexen, Lexeaus, and Zexion were frustratingly vague.

[He also had a sleeping Keyderp to keep an eye on.]