Eula does raise their eyebrows, and keeps them raised the entire time, as the strange magick Malos summons goes to work.

"Not quite what I imagined," they say as it works. The words are mostly thoughtful, though they do, in fact, take another step back, to be well out of range. "I've seen magicks of this ilk once before, and I've been warned that they can be... volatile." Though perhaps this man's is different from whatever it was that Aodhan did that day in Ala Mhigo.

As such, they let Malos take the lead through the door, and follow him up the staircase beyond. Unlike below, the walls are normal, and the stairs and banister themselves are typical of a service accessway - this was not a place passengers were meant to see, which is promising.