"I think I somehow angered it. Or I broke it. I refused to answer a ridiculous request, and I ended up in a completely empty room and a door that led out back into the festival. Meanwhile, my companion ran through a different door and died. So you can imagine I consider it more of a trial than anything else."

It's why she'd gone back to steal the rug. She's deliberately overwriting the story, making it less detailed and more favorable in her direction, but Imbros doesn't need to know that she had been wildly angry at the idea of having to confess anything to some imitation of justice. Or that she hadn't been able to fight off the figure with the scythe.