Wriothesley got himself a new assistant sent by the Chief Justice himself to help him run the underwater fortress with more ease, they're part of Marcheusse Phantom even though mostly Melusines are joined there, there's no human which caught the Duke's attention.

He can't help but get interested in them but his advances always get rejected. They're in Marechaussee maybe because they're like the Sherlock Holmes of Fontaine.

"Why are you so interesting to do than my work?"