Hassandra turned to Vatel almost as soon as she heard Toz ask for a lightning attribute grimoire, but then she realized that Vatel was a fighter, not a mage. So the odds of him having a grimoire was low, though he might have several martial manuals. But Hassandra didn't know if Toz would appreciate them. And that was if Vatel was even willing to give them up. It was at that point she realized what else Toz said.
"Wait! Space?! You're a space mage?"
Toz had explained his inclination previously, but not in detail. So Hassandra and the others knew that he was technically a spirit cat beast mage with a penchant for the various elements. But they didn't know what attributes he and the cats had. However, if he wanted to get grimoires of the right attribute, Toz had to divulge that, which he was more than willing to do if it could help them increase their strength.
"Well, yeah. Is there anything special with that?"