Ikki Kurogane vs Edelweiss

Ikki Kurogane vs Edelweiss is a fight between Ikki Kurogane and Edelweiss during Nagi's rescue from the hands of Akatsuki Academy.

Prologue
Akatsuki Academy's Reisen Hiraga kidnaps Nagi Arisuin and begins to bring him back to Akatsuki Academy for punishment for the betrayal of their plan. Shizuku then chases after them wanting to get Nagi back from Reisen, prompting Ikki to chase after them. Ikki eventually catches up to Shizuku and offers to help her in her quest.

Shizuku and Ikki Kurogane get to Akatsuki Academy, on a bike, where they are shocked to find the world's strongest blazer there to greet them, Edelweiss. Ikki tells Shizuku to go, knowing who this woman was, and Shizuku leaves Ikki to fight against Edelweiss, by himself.

Battle
Ikki quickly activates his Noble Art Ittou Shura, knowing the difference between him and Edelweiss, and judging it correctly as he was barely able to dodge Edelweiss's attacks. Ikki then charges at Edelweiss and after the clash, his hands and arms were left numb after barely blocking ten attacks. Ikki then uses Raikou and clashes with Edelweiss again, realizing what terror Edelweiss's sword technique truly is. During the clash, Ikki uses his illusionary foot work to make Edelweiss attack his illusion and afterward tried to lunge at her chest only to back away having been nearly decapitated in the process.

Ikki figuring that if he could not fight her in speed he would use power as he activated Saigeki, his first sword technique, giving him immense power. Edelweiss, however easily meets, and overpowers Ikki and cuts his forehead. Edelweiss nearly cross cuts him however Ikki is able to dodge the ferocious attack. Edelweiss tells him that he is doing well, although she did not stop her barrage of attacks.

Ikki deduces that Edelweiss always attacks him, and never defends, as she did not need to as he was far too weak to manage to hurt her in any way. Ikki then decides to try and disrupt her rhythm using his sixth sword technique Dokuga no Tachi, which would cause the vibration of her swords and his clashing to destroy her internally. However, Ikki ended up being the receiving end of the technique, as Edelweiss had used the exact same thing on him. Edelweiss then sliced through both Ikki and Intetsu, although it was not fatal, as Edelweiss did not want to kill him.

Ikki however, still wished to continue as he swung his blade at Edelweiss. Ikki tells her that he would not let Shizuku down, and realizing his conviction she decides to give Ikki proper respect and had become serious. Edelweiss had backed away from Ikki and then charged at him with her full speed and power. Ikki had taken on Edelweiss but was easily cut but her, and had finally fallen to the world's strongest swordsman.

Epilogue
Kurono Shinguuji arrives just after the fight being very angry at Edelweiss. However, she did not act on her feelings as she already knew the difference of strength. Edelweiss left Kurono with a message to Ikki which was to tell him the next time they meet she hoped that he will be a worthy opponent, which she promised she would tell him. Kurono then noticed that there was blood where Edelweiss was standing figuring that Ikki had some how managed to cut the world's strongest.