Whisper raises her glass to the toast as well, then moves her mask up her face just a notch; enough to drink. Though the mug obscures most of what's thus revealed, the observant may catch a glimpse of smooth greyish chin, and thin, lipless mouth, before the mug is drained and the mask replaced.
"On the morrow then, classmates. Good night."
On her way back to her bedroom, Whisper visits the local bookstore and seeks to buy (if they aren't too expensive) a book on the giantish language, and a book about the sahuagin. Finally, again, budget permitting, she looks to see what's available on the subject of the mysterious dark elves (in the case of sahuagin and drow, she is looking for accurate, realistic portraits too...references she might use to assume their likenesses). Then, tomes in hand, she retires to her small, spartan little room to read until she must sleep.
The following morning she wastes no time, and is at Dean's office door directly on time.