Basically, the issue with the footsteps is that Eustace would have known it was Phil was behind the door all those years ago because he has such good hearing. But even knowing she was there, he said hurtful things like how Phil didn’t resemble Eustace or Isabella, how she was a disappointment, etc. He deliberately said it for a kid to hear because he didn’t care about her or her feelings, and maybe even wanted to hurt her.

Pause- what was that in 114??? What did the footsteps tells you??? What??? I'm confused..... ????? What different kind of footsteps??? Did Phil realized that the emperor knew she was fake all along and that her footsteps behind the emperor's door can be heard yet the emperor didn't do anything??? What??? I thought they already established that part n that's why the head mage is ther??? What???? Can someone explain tf happened???