"..?" Estelle was puzzled at the sudden barrage. She felt left out.
After compiling the information and matching it with each other, they reached the ultimate conclusion. Indeed, Duke Miller's powers should just be the remnants and nothing more.
The [Spectre] in question adhered to the suspicion they had, it really was a spirit that made him gain the [Contractor] title.
According to Yulia's search, the mansion had traces of the [Spectre]'s powers, but it was already faded and easy to breach. Most of it was concentrated around the Duke's physical body, so it could be assumed that the Duke had something on him that preserved the power.
If the Duke's status didn't display the magic as [Spectre's Magic Code], she wouldn't have came to this theory. The 'Magic Code' in question should be due to the reduced magic- from the original [Spectre] into its remains.