Seeing that pure brute force won't cut it, Xenovia and Yuuto charged at Kokabiel to engage in close combat battle. Kokabiel only sneered at them and conjured two swords made out of light and fought the two.
Xenovia and Yuuto were, of course, not his match. By just having superior physical attributes and experience, Kokabiel utterly destroyed them despite their strong weapon. Xenovia managed to draw blood from his cheek but was kicked away while all Yuuto's conjured Sword of Betrayers were smashed into pieces with his five pairs of black wings.
Koneko used this chance to sneak up under him by using a bit of Ki to use Flash Step. Kokabiel was shocked that a white silhouette suddenly appeared and tried to punch his throat, 'What? Instant teleportation?' However, even though he was caught off-guard, he still managed to calmly react and used his arms to block her attack and kicked her away, making her cough blood.
"Koneko!!!" All of them called out, and Akeno caught her mid-air and hurriedly brought her to Asia's side. Most of the damage she took is not from Kokabiel's kick but from her forceful use of Ki.
Kokabiel was about to praise her for her actions when he suddenly felt a killing intent behind him. With his intuition kicking in, Kokabiel shifted his body to the left a little bit without looking back and a knife went through his body just missing his heart by a centimeter or two, 'What!?' Still not looking back, he used his wings to cut up whoever sneaked up behind him. He felt feedback, but not much.
Aika took the chance when Kokabiel is a bit distracted on Koneko's actions and sneaked up behind him using Flash Step and aimed for his heart. But who knew that he was still able to react from something like that. Aika knew that she failed so she tried to retreat. Since she still can't use Flash Step consecutively, she jumped backward with everything she got but still got hit by blade-like wings even after blocking a few of them with her Sacred Gear. Due to trying to catch his wings, Aika flew off and was about to crash to the wall of the school building. If that were to happen, she doesn't know if she can still breath after.
However, luck is on her side as a ball of water suddenly appeared on her path and cushioned her fall. The ball of water dropped down to the ground with Aika gently and she suddenly heard someone calling her name, "Aika!!!"
"Kaichou?... What are you doing here?" Aika is currently enduring the pain of the cuts all over her body. She's wondering why someone who should be maintaining the barrier is here.
"Some unknown lady is currently maintaining the barrier and she's a lot stronger than me. Nevermind that you're not in good shape!" Sona scanned her with her eyes multiple times and confirmed the cuts are quite deep. She carefully looked where she could carry her and put her in her arms. She hurriedly flew towards Asia who is currently healing the groaning Koneko.
Sona gritted her teeth at this sight, 'These are two people important to him... This battle is impossible... Kisuke...'
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"Hmmm? There's an unknown robed human approaching the school..." Vali reported.
"So many strange things going on today... Let's watch a little longer. It seems another variable is about to join the already complicated situation." Azazel replied.
The cloaked human approached the heiress of the Sitri Household and talked with her for a moment. A few seconds later, the cloaked human touched the barrier and Vali can now freely feel that the human is injecting a huge amount of Demonic Power into the barrier, strengthening it, '!?'
Azazel also saw what the human did but he can't feel the aura from the other side so he's puzzled at his reaction, "What's up Vali?"
Vali didn't answer her and just modified the magic circle of their communication to let some of the aurae from the surrounding to go through the communication line. Once he's done, Azazel exclaimed, "What!? That's clearly a human! How the hell he can release that amount of Demonic Power!? That on the level of High-Class to Ultimate-Class!... Too many strange things today..."
"What should I do?"
"Let's watch, of course! I want to know what the hell is going on too!"
They watch as Sona hurriedly went inside the schoolyard despite her peerage's protest. But before she could reach the schoolyard, Vali and Azazel saw something amazing. The Rook of the Gremory peerage found an opening in Kokabiel's defenses and instantly accelerated. The speed she traveled is comparable to the speed Vali is capable of while in his Balance Breaker, "What!?"
But before they could get any answers, something bizarre happened again as the human girl they are putting a focus on suddenly did the same thing and ambushed Kokabiel from behind and managed to pierce his body, "Azazel... What's that?" Vali couldn't help but ask. He was dumbfounded by the instant acceleration without any sign or fluctuation in magic. And to top it off, two of them simultaneously used them, including a 'very normal' human. Since the only things he uses in battles are his Sacred Gear and his Demonic Power, he doesn't know how to judge that, so he immediately asked Azazel.
"...I don't know..." Azazel's eye's lit up after seeing it. Although more and more questions kept popping up from his mind, he didn't hate it. On the contrary, he's excited to see such a spectacle, 'Since a Devil and a Human can use it... It's probably a technique or some sort of magic... But what system is that?'
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Kokabiel blankly looked at Aika who is being carried by Sona towards Asia for a few seconds before laughing out loud, "Fu... Fuhaha... Fuhahahahaha!!! I didn't think that a mere human would be able to wound me using a broken Sacred Gear! HAHAHA! And it seems that you're not from any factions! Amazing! HAHAHA! Too bad, you won't be able to fight in your state anymore. Although what you used is an assassination, you've impressed me! You can take that honor to the afterlife!"
Kokabiel calmed himself down and remembered that he also received a cut from the exorcist wielding the Durandal, "Kuh kuh kuh... Although not as amazing as that girl over there, you two fight well. Even after having lost your trusty Lord..." While his right hand is covering his wound on his chest which already started healing, he used his left hand to feel the cut on his face.
They were taken aback by Aika's actions, especially Xenovia, who sparred with her not long ago. She didn't think that she's hiding a card like that and if their spar is a life or death battle, she would probably die without even knowing it. She wanted to ask Aika about it, but Kokabiel's words caught her attention more, "...What are you saying?" She asked while having a bad feeling.
"BWAHAHAHAHA! I suppose they don't tell you maggots much, do they? Now's as good a time as any, you should know..." Kokabiel then flashed a cruel smile, "God is dead... It wasn't only the Devil Kings who perished in the Great War. God was also killed."