Ruruko Nimura is a first-year high school student at Kuoh Academy and one of Sona Sitri's Pawns. Ruruko by chance, happened to learn about Sona and her peerage being devils and willingly asked to be reincarnated into her peerage. Sona did so and she joined the Student Council in the process.

Ruruko is a short girl with brown hair in long twin ponytails and green eyes. She wears a pair of green clips in her hair and she also wears striped green stockings.

Ruruko has a crush on Genshirou Saji and her crush on him began when he started giving lots of help once he started doing Student Council work. She has a hot-headed wanting to solve problems through violence, rather than negotiation. So when she inspected that Saji isn't breathing after taking Kisuke's attack, she already jumped into a conclusion. Brandishing her fist, she rushed towards Kisuke with hate-filled expression, "YOU BASTARD!!!"

Kisuke dodge by sidestepping and took out his cane. Ruruko wanted to turn around to rush to him again, but just as she turned around the tip of Kisuke's cane hit her forehead with enough force for her lay down on the ground with her back, "Kuh..."

Kisuke flipped forward, landing near Ruruko's head suspending the tip of his cane just a few millimeters away from her face. Ruruko tried to stand up but found her whole body pinned to the ground, 'I can't move!' She looked up towards Kisuke who is now wearing a blank expression, looking down on her and fear finally began to creep on her as she notices strange energy coming from his cane. It feels like a sharp sword is about to drop to her face killing her in the process.

Kisuke just used a Zanjutsu technique called Shitonegaeshi (Cushion Return), which aims to subdue an opponent and immobilize them on the ground using coercion alone. Kisuke suspends the tip of his cane millimeters from his opponent's face after he has already struck them down.

"Ruruko!!!" When Sona's peerage members saw that Ruruko is now in danger, they all took out their respective weapons and most of them rushed towards Kisuke to help Ruruko, but they stopped their steps when an unexpected person went in between them.

"Koneko!?" Rias, Akeno and Issei shouted as they wake up from their stupor. In just a few seconds, a lot of things happened that they weren't even able to react properly.

"What's the meaning of this? Toujou Koneko! We know that you're very close to him, but we won't let him go for killing Saji and taking Ruruko as a hostage! Even if you're from Rias-sama's peerage!" Without Sona and Tsubaki, Momo Hanakai is acting as their current leader. She is a second-year high school student at Kuoh Academy and one of Sona's Bishops. And she's fuming with anger as one of her precious comrades in not breathing after getting hit by Kisuke's palm and another one is being pinned to the ground by the same assailant with a fearful expression on her face. She's also panicking because she doesn't know how she would explain this to Sona. And now one of Rias' peerage members blocked their way to save Ruruko, she almost lost her mind.

"Koneko! What are you doing!?" Rias shouted and about to drag her away.

"Please calm down, all of you. Genshirou-senpai isn't dead. He isn't even hurt that much." Koneko spoke with her deadpan expression and slowly walk through the group and towards Saji who's unconscious. She ignored everyone's stares and used the coercion technique that Yoruichi taught her that pressures those around her by using her aura alone.

Everyone in Rias' group is also dumbfounded at Koneko's pressure. 'What the heck!' And they all have the same thoughts.

Koneko reached the fainted Saji and crouched down. Tsubasa Yura, who's left behind to guard Saji wanted to block her but can't move from her spot due to the unknown pressure she is releasing, "What are you doing!?"

Koneko ignored her and raised her left arm, "Eyy." She brought it down, slapping Saji's chest. After that, Saji coughed out and regained consciousness. He looked around in confusion and noticed everyone's dumbfounded expression looking at him, "What's happening?"

Koneko stood up and walked away while saying, "You lost."

Saji heard her and it all came back to him now. He took one strike to the solar plexus from Kisuke's palm and was launched into the air. Before he hits the ground, he already fainted, "I lost." Saji let out a big sigh and became frustrated with his own weakness.

"Saji-senpai!" It was unknown when Kisuke lets go of Ruruko and she rushed to the awakened Saji, hugging him while crying.

"Ruruko-chan!? What's happening?" Saji doesn't know what to do and looked around to look for help and try to understand the situation, but he noticed that everyone still has the same dumbfounded expression, 'Really! What's happening?'

Kisuke, who's being silent all this while suddenly spoke up, "Well then, Gremory-san. Please enforce the bet we had just now."

They all looked at him with complicated expression while he dusts his school uniform. It took Rias a while to reply to him, "I will certainly do that."

Yoruichi jumped to Kisuke head again, "Since we're done here, I'll be taking my leave if you don't mind."

Momo Hanakai wanted to stop him and apologize for what happened earlier but didn't know what to say so she hesitated. As she was about to call out to him, Kisuke suddenly stopped walking and turned around to face all of them.

"Right, I forgot to say." Kisuke looked at everyone before smiling, "Since I'm already revealing myself like this, I don't want any more snooping around my house or my shop. And no more investigating those around me." Kisuke then focused his sights on Rias and Akeno, "I let you do so earlier because you're just worried about Koneko-chan and no real harm was done, but I won't permit it anymore. My house cat is getting restless you know~."

Rias and Akeno narrowed their eyes and thought, 'Isn't he getting too full of himself just because he can fight a bit better than the rest?'

Rias opened her mouth and said, "And what if we don't listen to you? You probably don't know, but I'm the supervisor of this town and someone dangerous as you can't go off my radar."

Kisuke's smile grew deeper and said, "I don't care if you're the supervisor, the Mayor, or the Devil King's little sister, but I already gave my word, so please don't disregard it so readily."

As he finished his words, a sudden pressure enveloped them except for Issei, Asia, and Koneko and they almost dropped to the ground.

"All I can tell you is that you wouldn't like it very much."