[After such a disturbing awakening, she needed to find out as much as possible about this dome, and there was just the slightest suspicion that going with Sentience wouldn't answer a lot.
So she's already found the building by the time Cross enters, found Guy and Natalia; Nunnally and Lelouch, and tears her gaze up from the latter as the sound of his footsteps come down the aisle. The look on her face is barely more than her standard impassiveness, but there's an unmistakable note of pain in her eyes for a moment.
It masks the moment she catches his own expression]