The Meguri were the ruling lineage of the Meguri House, which was directly to the west of the Ryusei House before the return of the Unicorn. After the Mirumoto family daimyo at the time (Mirumoto Januko) decided to cede their lands to the Unicorn, the Meguri daimyo (Mirumoto Kanayo) and many of her former retainers conspired to assassinate him.
The Meguri lineage suffered as a result of this, and for generations now has been too small to hold a seat on the Ryusei Chancellary. Those who remain in the lineage are fiercely loyal to the memory of their ancestors and refuse to merge with other larger lineages to keep the memory of their once great House alive.
The Ryusei House promotes peasants to samurai status more often than most other Houses; still not very often but still more often than most Houses. Those peasants good enough to receive such an honor tend to be especially badass, but most lineages don’t want them. The Meguri lineage accepts such people with open arms, which raises eyebrows from other lineages. As a direct result of this policy, Mirumoto Guru (the most famous Imperial magistrate alive today, and the grandson of a peasant) belongs to the Meguri lineage.