[ Aside from when she's explaining things or answering his questions, Yuna remains largely silent. She wants to give him ample time to look around, to take in the sight of the temple without her interrupting him with too much talking.

She also imagines that it's not looking at the temple itself that's causing the expression he's currently wearing. She did just drop a bombshell of sorts on him, and she imagines he needs time to process that as well.

Naturally, she can't know about his history with the Pharaoh and how he defeated him at the end of everything, or the responsibility that seems to rest on his shoulders. But she can guess that something is weighing on him, and she wonders what that might be.

When he turns to look at her, she meets his gaze squarely, not looking away or blinking. ]

They are intertwined, and one ends where the other begins. [ She pauses to correct herself: ] It's more of a circular type of relationship rather than one with an ending and a beginning.

I suppose that you might think of it this way: the spirits are the Fayth and the Aeons are their physical manifestations. Within the realm of Duel Monsters, the Aeon is closest to what you are most familiar with.