Danae’s response was broadly similar to Aloisa’s.  She’s a soldier and regards Blanche as a threat.  To be clear, though, I’m happy to work within the plot arc.  This would be typical of Ravenloft, where the desire to leave a place of dread is matched only by the impossibility of the task.  Any excuse to keep Danae in the asylum works well for me.  She can readily be persuaded (possibly guilt tripped knowing her psychological vulnerabilities) into a course of action that sounds plausible; similarly, her attitude to Blanche is open to change if the Doctor establishes herself as the ‘least worse’ option among the threats in the asylum.