[He sees the hints of recognition mixed in with the surprise on Axel's face, but isn't keen on clarifying why he would look familiar.

This isn't the first time that he's glad for Xehanort's, and then Xemnas's differing coloring.] You've probably noticed it by now; sometimes, people arrive from a similar world or set of worlds and remember things a little differently. They can be from your past, your future... or in some cases, from a set of worlds where things just... happened differently.

[Which was an understatement, but it got the point across.] Stranger still, some of us have another version of ourselves here in the tower with us.

[And no, he's not talking about Replicas.]