The fairy mode is a great look - the implications of four hundred years of a completely isolated school of thought for research and develop is fascinating (and may provide a completely unexpected key to the outside world problems).
The arc took a while to get the ending, but the suffering was well deserved and the local host ended up looking like a boss. Deserved the S clear rating.
Something clever by the artist: when Brian stands up; even though she's in the low-grade racing gear, with the jacket and her torso obscured, it almost looks like her signature.