Wild spirits living as captives

The fire in their eyes would be enough to keep the firefighters busy for hours, but they are still being kept behind high bars or tied to brick walls. Curious about what the visitor's intentions are, while also wondering if they can make themselves interesting enough for the visitors to want to offer them a treat. One accepts the stranger to enter the personal space, while the other worries about them being a threat not only to its personal space but also to its territory. Both keeping their heads held high even though the actions are of completely different reasons.