Ah, the timeframe's off. It'll be detailed in Misa's post. Logically, there's no way they would be sitting around the entire time that Adam and the Headmaster are discussing these things...
Just trust me, they're gone. And besides, Ren has been at the school for, like 9 years, and knows Miataea by name. They certainly would have interacted in the past. (I just realized that without the sheet, you had no way to know how old Ren is. My bad. She's 19, and has been at the school for a long time.)
EDIT: Assume that a few moments after Ren asked "option A or option B?", Aoife said "option A", and they both made their way immediately out of the building.
Just trust me, they're gone. And besides, Ren has been at the school for, like 9 years, and knows Miataea by name. They certainly would have interacted in the past. (I just realized that without the sheet, you had no way to know how old Ren is. My bad. She's 19, and has been at the school for a long time.)
EDIT: Assume that a few moments after Ren asked "option A or option B?", Aoife said "option A", and they both made their way immediately out of the building.