"So...are you going to introduce yourself to me or what? I did give you my name," Corentine said, at least trying to show some friendly side of her as opposed to how harsh she was upon seeing Takahisa here.
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"You should go to sleep, it's quite late and dark outside," Umiya says, even though she shows no sign of going to sleep or anything related to rest. This may be a side-effect of being immortal, that Umiya had no need to sleep, no need to eat or drink, not even a need to breath if it came to that.