These are the samurai of the Karasu Clan of the Yamatai Star Empire.
Before the outlawing of slavery in the Yamatai Star Empire, the Karasu Samurai were frequently used as enforcers in the slave trade that made the Karasu Clan rich. When the Clan shifted to work in banking and accounting, the Samurai became guardians of the Clan's wealth and property, protecting each with their lives and Naginatas.
“We are the North Wind” is their motto, which is to say: Cold and biting.
Karasu Samurai are trained in the ways of the sword and bow, but they favor the Naginata for its reach. Each Karasu Samurai owns and typically carries a Naginata with the Karasu Raven imprinted on the blade.
They follow a simple code: “Clan, Honor, Blood”. This Code is explained further, below.