分家と本家。“双閃光”と“柴閃光”。
戦いは、分かたれた双子の再会の如く。

「お前の正義…とくと見た」

かすれた声で、分家の青年が納得の言葉を漏らす。その羽織が抱き支える相手の血で汚れることも厭わずに。
満身創痍なれど晴れやか。決して向き合えない両者が、清々しく笑った。
（ウィンストン・フロリオ『無銘の傭兵たち』第五章）

The school became split into two, Sosenko and Shiba Senko, and also marked the split of brothers into branch and main families. The twin sword fighters came together and immediately came to blows. "I think...I have seen enough of your justice," the brother of the branch family croaked out under the bright sun as the brother belonging to the main family caught him in his arms. Finally, these two who could never agree on anything, laughed softly together. (Winston Florio, The Unnamed Mercenaries, Chapter 5)