Scaling Acqua to Knight Leader

Knight Leader had merely kicked. Even so, Kanzaki’s body of a Saint was blown away along with the guarding scabbard. While she was knocked back and lost her balance, Knight Leader sent his clenched fist into her gut. A tremendous sound rang out. Kanzaki’s body was blown back ten meters without landing and she struck one of the guard carriages. The carriage was protected by a number of spiritual items, but it was still smashed to pieces from the impact and Kanzaki’s body slid along the ground after passing through it. The horses tied to the carriage panicked. “Gah....Wha—!?” (I thought this was going to be an issue that normal methods weren’t going to work on, but what’s with this tremendous power...!?) Including Saints, there was a maximum amount of power that a flesh-and-blood human could control, but he had clearly surpassed that. (Don’t tell me he’s using the high-speed stability line like Acqua of the Back...!!) Kanzaki was having trouble breathing as doubt entered her mind, but she didn’t have time to think over it calmly. Knight Leader had already jumped up five meters in the air and the soles of his shoes were approaching in order to crush her. “!?” Kanzaki immediately rolled to the side. But even with her physical abilities as a Saint, she couldn’t get to safety in time. She avoided a direct hit, but the destroyed asphalt scattered around the area and struck her. Knight Leader looked silently down at Kanzaki as she rolled to the side with blood gushing from her. He was not watching her cautiously. His expression said that he saw no need to hurriedly pursue her. “Why do you look so surprised?” Knight Leader gently spread his arms wide towards Kanzaki who was completely on guard. He did not seem worried at all. He almost seemed disappointed. “I am the head of the Knights, one of the three factions. Even if you are a Saint, you are still just one member of the Church. Did you really think you could fight on my level?” “!!” Without responding, Kanzaki fired off seven wires. Nanasen. “...Long ago, an old friend of mine hit me with a dreadful surprise attack.” Knight Leader did not seem worried. He held a hand up in the air, grabbed all of the wires fired towards him, and forcefully ripped them apart. He hadn’t used a weapon. In fact, he hadn’t even used both hands. “Ever since, I have always been on the lookout for surprise attacks.” While he spoke, Knight Leader “threw” the destroyed wires. Even if they were sharp, they were still basically just strings. They shouldn’t have had any power to them, but Kanzaki’s body flew back like a fired shell when they hit her.
(Toaru Majutsu no Index Volume 17, pg 201-202)

He spoke about what Kamijou had told them Acqua had said. “If it’s true that Acqua defeated Knight Leader who was such a major obstacle for us, this may have actually turned in our favor.” “...Yeah, but Acqua is a member of God’s Right Seat. Also, that’s just what he told me. I didn’t actually see him defeat Knight Leader. Shouldn’t we keep in mind that he could have told us that as part of some plan?” “One of our scouts has confirmed that those two really seemed to be fighting at Folkestone. Since Acqua is freely moving around, it’s only natural to assume for now that the head of the Knights was defeated.”
(Toaru Majutsu no Index Volume 18, pg 79-80)