Not in the same way, necessarily. The hostages are collateral for Katerina, so far as I know.

[ "Their" group is different, or that's what he would assume based on how the information was presented. And yet: ]

But I would caution against assuming that just because they're Katerina's project that they're safe from the demons. Considering how these creatures work, I have no doubts that they'd be happy to take more, to be blunt.