To be frank I kind of expected Ciel to pop up after fighting the ogre; there was no way that they’d kill Ciel for real.

This series is all about being helped and helping out. The people in the Blazing Sword help Ivy, and Ivy cooks them a meal. She wasn’t required to do so, but after having them saving her arse from being kicked by ogres, it was only natural. And it seems that they’re genuinely worried about her.