Parvati didn't move. Her hands gripped the edges of the desk she leaned against, trying very carefully not to bump the chair beside her. She couldn't make out the features of the visitor, only their outline, the fall of their robes, and the small thin outline of a drawn wand.
The school was on lockdown, it couldn't be another student. What if it was the person who had caused the lockdown? And here Parvati was, alone and cornered, with no wand. Perhaps this person didn't see her. If it was too dark for Parvati to identify them, perhaps she herself was hidden among the darkness of the classroom.
She bit her lip, not daring to say anything, not daring to make her presence known.