I'm puzzled, regarding Yui.

I thought Yui's data was stored in Kirito's VR headgear. That being so, how can she exist in ALO without him being logged in? Was that explained and I missed it?

Anyway, saw episode 7. Is it me, or is the pace kind of dragging so far? Maybe I'm just not used to watching the show once a week (I binged the first season on Netflix).