There was no choice. Either the lives of the traitors or their own. There's only enough extract for one – apparently, that person will be Ayano, without whom they definitely won't survive in the palace. Shimizu told Livia to quickly get the extract and give it to the priestess Yanagi (if she doesn't manage, then I'll do it myself. The main thing is to be in time), and Nihonka quickly examines the room. Maybe there's another extract here? Or maybe the blood of this creature will be useful?
Shimizu-chan is calling for Castor's help.