Clearly?

Ryu's brows arched. Of course he knew that Quibus Faeries were one of the three ruling Clans of the Faerie world and Ethereal Plane. They reigned over death and the most powerful Necromancers in all of existence, without fail, always had a Quibus Faerie by their side. 

Unsurprisingly, much like the other ruling classes of the Faeries, the Quibus Faeries weren't known for their combat prowess either. And, despite ruling over death, they spent much of their time meditating and reflecting upon it, grasping at abstract concepts a lot like philosophers would. 

However, just because Ryu understood just what Quibus Faeries were didn't mean he understood how Ailsa could be one of them. He had never heard of a Faerie having two attributes, though he had never really thought of what might happen if a Faerie bonded with another powerful Faerie.