About the voice part maybe he forgot because he was very depressed after what happened to Lucas also sometimes trying to remember something you forgot after a long time has passed can make you start hearing things and make you question if its the correct sound or not . Also why did no one tell him that she had brown hair at least but also since Ethan wasn’t talking with him so he couldn’t also Violet was busy with her father but idk thats only what I think
（￣へ￣）
Voice is not that easy to remember, Vincent even says that some ladies sounded more like "Paula" than the real Paula. And Vincent fired all servants before he knew Paula lied to him about her looks so he didn't ask them. Not sure about Ethan, maybe he did that out of respect to Paula? Or he just enjoyed watching Vincent suffer lol. I have a feeling that when they meet the next time Ethan is getting punched again lol
Yes, It's really hard to recognized through voices That's why he was hesitantant
I feel like there's a few plot holes. How did he not recognize Paula's voice? How did Ethan or the others not tell Vincent how she really looked?
Also, I hate how they all love her, but still have no problem with her serving them. Even after it's confirmed, they still treat her like a maid. Vincent especially. :(