Complex sentence: Coming across Azumi later, she tells her that she and Nagara were separated, but when she attempts to kill Tessai, Azumi realises that something is not right and asks for the true fate of her friend Nagara.
Split into simpler sentences: Coming across Azumi later, she tells her that she and Nagara were separated. However when she attempts to kill Tessai, Azumi realises that something is not right and asks for the true fate of her friend Nagara.