Kanter only told everyone that Dura was drawing the demon to their base. But he didn't mention Dura's extremely wicked look, or how she was cursing loudly that she would use the base as cannon fodder so she could escape.
"These gutless apprentices should feel proud that they at least have some use, helping a mighty wizard like me live!"
It was clear that Dura intentionally headed to the Overwatch Base with the demon in pursuit. Though she had no idea about the deadly curse on her. As long as the curse was not removed, the demon would keep chasing her till the last second. How many unfortunate people she dragged with her to death didn't matter.
"Whatever she's planning, we must stop her!" Sennefer clenched her teeth in rage.