In the corner of the garden is a tent, large enough to hold only a cot, a bedroll, a small table, and two elves. This is where Sina has been resting after opening the rift, and where Nari has been keeping vigil over her.
Being that it's midday and Sina has been awake for a while, Nari has presumably gone off to do some necessary errands. This leaves the First sitting in bed, working on copying runes from a large tome, her pale fingers stained with ink.