Turning back time a bit, Kisuke's Reiatsu was largely ineffective against the girls aside from making them a bit sluggish at the start until they could acclimate themselves.
Even though Kisuke couldn't attack back, the girls still did their best to control his movements before going in for a strike to ensure a good hit. While this is a good practice, it should show how much experience they were lacking since a real battle isn't just a simple game where you could win through a series of planned actions. Sometimes, it's better to just dive into the danger to change the pace and take control of the momentum.
Surprisingly, Claire, Kunou, and Tanis managed to realize this when Kisuke suddenly started to effortlessly dodge and block their attacks while also predicting where and when their restrictions on him would appear and sometimes, even return them to them.
At this point, Kisuke had already 'killed' them more than 5 times. Though it might be less than that since they were able to back out a few times, but not always in time. And Kisuke doesn't really know what sort of healing capabilities they had, but he assumes that they'd never forgo practicing such techniques and spells.
Those who knew Kisuke might think that he's holding back, but to a certain extent, he's actually not. The reason he was only able to 'kill' them more than 5 times was because of Claire and her [Worthless].
Because of Claire, Kisuke's stalwart defense became a cardboard box so he was actually in danger of being severely injured. At this point, Kisuke had actually become afraid that Claire could also disable his High-Speed Regeneration so he released his Hollow Form in an attempt to increase his resistance against her [Worthless].
However, Kisuke could only laugh. Even though his resistance really went up, Claire only responded with finer control, and the moment an attack was about to land, the white Hollow matter that was covering his skin would melt away. Not just Hierro but also his Cero, Bala, and even Negación which he hadn't used much were disabled.
Next, Kisuke released Benihime but the same as with his Hollow Techniques, all of Benihime's energy-based techniques were also dispersed as soon as they appeared. Thankfully, his Flash Step and Shunko were still working with the latter having the same fate as Hierro, albeit, a lot tougher and slower to melt. But when he saw Claire's eyes curiously eyeing everything he was doing, it made him nervous that even his mobility would be reduced.
Another set of techniques that Claire's [Worthless] didn't work on fully was his Kidou spells. But after seeing them enough times she should also be able to disable the weaker spells without any problems.
Because of all of this, Kisuke had a certain thought, 'Should I bring her to that world? She'd be one of my greatest weapons, but I might get killed by her parents.'
Although Kisuke's attention was mostly on Claire, Kunou and Tanis' abilities couldn't be discounted. Unlike Claire, who's an allrounder, Kunou and Tanis had fallen into a specific role and trained for that role. Kunou, with the versatility of her Youjutsu, became the battlefield controller, creating opportunities for her allies and limiting her opponents.
Tanis, on the other hand, tapped into her Dragon lineage and used her naturally strong physical attribute to become the main bruiser. Using both Draconic Aura and Ki, her fighting style came to resemble that of Crom Cruach. In other words a complete musclehead.
About an hour after they started, Kisuke was finally able to figure out what their limits were and was about to wrap it up by telling them to give him their best shot. And they delivered way more than Kisuke had expected.
The first one to move was Tanis gathering and fusing her Draconic Aura and Ki on top of her palms, creating a purple energy ball the size of a basketball court. Meanwhile, Kunou kept to her role and tried to tie Kisuke in place while also obscuring his senses by creating a thick fog that covered the three of them.
'Although it obscured their presence, it doesn't make sense to use it on Tanis since that enormous thing can't be hidden.' Thought Kisuke, 'It's so obvious that Tanis' attack is also just a distraction. So Claire is going to sneak up on me?'
Kisuke was correct, albeit, only partially.
Within the thick fog that confused the senses, a big purple ball of energy blasted through and came crashing down on Kisuke. Since it was big, it was also slow so Kisuke had enough time to try out a few things.
Kisuke first cast Danku (Splitting Void), but he'd already used it several times in front of Claire and understandably, the barrier disappeared into thin air. Next, he brought out his Millon Escudo (Million Shield), but before it could expand, it disappeared and Kisuke felt it return to the back of his head where it remained inactive.
He already knew what was going to happen if he just received the energy ball with his body so he raised Benihime over his head with his left arm to slash through the ball.
Kisuke could have dodged, but within this limited space of the training ground, he'd have only left himself open if Tanis could control the ball's trajectory.
At the moment of contact, there was a large shockwave that cleared the rubble and leveled the surrounding stones. Benihime sank into the energy ball but was stopped by the incredible force behind it. However, Kisuke noticed that something wasn't right, 'This energy ball... Doesn't have a core?'
He couldn't think much about it since he knew that Claire would be coming any second now and he only has his right arm to intercept her.
Kisuke expanded his senses within his perimeter, but after looking around, he still couldn't find Claire and he was already about to cut the energy ball in half, 'Did she miss the timing?' But thinking about the teamwork they'd shown until now, that's most certainly impossible.
At that point, Kisuke suddenly felt something weird. Something that shouldn't be here.
He immediately expanded his senses further but because of the energy ball in front and the fog around him, he took some time before he could make out what was behind the attack. Then it happened. A bright golden arrow of light pierced through the ball of energy and reached Kisuke in an instant.
Kisuke was shocked at this incredibly out-of-place Power of Light that only the servants of the God of the Bible could use, but he had to move. He wanted to block it with his sword, but Benihime was still stuck within the remnants of the energy ball. Without much choice, Kisuke raised his right hand to catch it.
Before he could touch it, the Hollowfication of his arm was undone. Nevertheless, he was already expecting such a thing to happen and gritted his teeth as the arrow of light instantly burned his hand and started to work its way up his arm.
After securing it within his palm, Kisuke took a deep breath and spontaneously released his strength to flick the arrow away.
The deflected arrow continued traveling and eventually reached the wall of the training ground before exploding into a pillar of condensed power that could instantly vaporize those High-Class and below.
Kisuke didn't look back at the destruction and made sure that there were no more incoming attacks next.
The 'empty' energy ball evaporated and the fog dissipated, revealing the three girls huddled together and catching their breath. In Cleria's left hand, Kisuke could see the remnant of a bow made out of light, "Now that's what I would call a Balance Breaker. What the heck? Did she somehow inherit Uncle Masaomi's exorcist power? How is that even possible considering how she's fully capable of using [Worthless]? Isn't that cheating? Did another cheat character just make her entrance?", Kisuke muttered to himself.