At the moment, not all of the content he is in has been identified(as I am waiting for archivists to give me footage) therefore I have listed this as a long-term role in case more lines are found. For now, I assume he will be a minor role dialogue-wise 

As the Phantom Thief, Nox's goal is to collect all of the magical items that his father created in order to destroy them. Nox knows a secret about his father's tools that could potentially be dangerous enough to start a war. In order to prevent this from happening, he seeks to destroy all traces of his father, family, and creations. 

Before Nightmare steals something, he usually sends a calling card with a hint related to what he is about to steal.

Phantom Thief Voice: On the higher end, flamboyant or elegant sounding. 

Accent: As Nox uses some illusion magic for his appearances as the Phantom Thief, it is a personal head canon that the voice for Nightmare is different than his normal speaking "Nox" voice. Therefore, I am also open to all types of accents especially standard english/british