Final answer:
The warden appears menacing despite her polite behavior due to her actions and demeanor.
Step-by-step explanation:
The question is asking why the warden is menacing even though she doesn't raise her voice and uses seemingly polite phrases. The answer lies in the way she carries herself and her actions, which can be inferred from the given passages. For example, in one passage it is mentioned that she turned around angrily when asked about something. This suggests that her seemingly polite phrases may be deceptive, and there may be something sinister beneath her calm exterior. Additionally, other passages mention her haggard appearance, mood swings, and the uneasiness she causes in others. These traits contribute to the menacing aura she gives off despite her polite behavior.