Lydia took a sip from her drink and, after thinking a bit about Merida's story. In short, they needed Jack's skill to investigate this entire case and find a way to ruin those wizards' plans. Any other day, Lydia would've rejected this since it would've been too dangerous to send Jack alone, but that won't be a problem since he was already a demigod.
Even if she was worried about him, she could send him with one of her incarnations to make sure he stays safe.
"I'm more worried about your demons. Do you think he can work with them?" Lydia then looked at her drink. "Sorry, let me rephrase that. Can your demons follow his orders and not mess things up?"
"Since I'm the one giving them orders, they'll obey him whether they like it or not. But that doesn't mean they won't try anything funny if given the chance. It would be best for Jack to keep his guard up even against my demons."
