Sakurai seems to get more and more comfortable in standard 3rd person VN writing whenever it's her turn to write something. It started from Arthur's trial quest and just became more apparent from there. Even if the plot didn't make it obvious, that certainly convinced me she was the writer.
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My motivation is honestly pretty average since I know the chapter isn't as long as LB1 and there aren't any servants I love here (though I am looking forward to meeting Bryn)