Nitoryu Seiken (ツインインフィニティ Twin Lightning Infinity) is a unique sword style that has been passed down to the main house of the Mikigami Clan. The style is known for its incredibly powerful and precise swordsmanship that is born out of the user's resolve to manefist his killing intent. The only known users of this unique style of swordsmanship are Fuko (the current clan head) and his son Hibiki. Hibiki is next in line to inherit leadership of the clan after his father due to his sister abruptly leaving the village and betraying the clan by stealing Inazuma.