Zandrae, Kemnoobie will not be able to catch anyone outside of the gate, they disappear around corners. But he can just walk in. Noting the shimmer gate is just a way of identifying the guests. Think of the voice as a magical recording device, it will not answer you.
Sydric will stop you if you try to leave. But he will start off being almost nice. Give me a chance to respond if you ask a question of either Syd or Hanna.