Double Swallow Style
Souen Ryu (双燕流, Double Swallow Style) is a school of kenjutsu which focuses on wielding two swords at once. The school was disqualified during the second round of the tournament and its members were eventually defeated by Sakura Shinnojou and Sengoku Iori.
- Nikaidou Misaku: The leader of the school, known as "The Murderous Sword". In the past he destroyed many dojous and schools while looking for worthy opponents. He's the one who destroyed Shinnojo's old Itten School.
- Magamitsuki (Ominous Full Moon): Misaku's main stance, allows him to parry an attack with one of his swords and attack with the other one.
- Souen School Secret Technique: Muhi Musou Renjin (Invincible Combined Swords): Misaku starts this attack by keeping both swords across each shoulder. Then he dashes at the enemy, attacking first with the shortsword from below (in order to catch the enemy offguard) and then attack with the longsword, which was kept out of sight previously.