Buster Keel Wiki
Black Devil Sword
Info
Kanji 刹鬼黒流 壱之太刀(せっきこくりゅう いちのたち)
Romanji Sekkikokuryuu Ichinotachi
Type Fighting Style
User Kurokiri Setsuna
Manga Debut Chapter 9

Black Devil Sword One Sword (Sekkikokuryuu Ichinotachi) is the one sword style that Setsuna uses.