They probably all thought since he was standing here, he was probably the host of the banquet rather than just a lackey. Edward heard them whispering among themselves about this.
Still, he didn’t bother explaining because he felt it was an excellent way to protect Darius by having the guests misunderstand his true identity. He couldn’t tell Darius about this, though, because he knew Darius wouldn’t agree to it.
He revealed his true identity after keeping the guests guessing for long enough. A