I'm afraid I may have made myself less able to see that it was Park by not truly considering what Park was doing when she wasn't "reading"! See, TJ asked her how she dealt with stress, and in that slight pause before she answered, I filled in for her, "I write fanfic." Shen then answered, "I, um, read. . . ." and I added, "Fanfic!" I'd half convinced myself that she was retreating to her quarters to write fanfic in secret!