Riser left after failing to catch Kisuke much to his dismay. All of his elegance went down the drain because of him and he won't ever forgive him for this slight.
Seeing Riser left for good, Sona was about to bid her farewell too when Grayfia stopped her, "Sona-sama. May I please asks a few questions?"
Sona knew what she's going to asks but she can't refuse outright, 'I wonder how should I tell her?' Sona nodded in response.
"Rias-sama, please answer too if you knew some things." Grayfia also lets her in the conversation.
"Alright. But I doubt I can help you." Rias nodded. She also wants to hear more about him from Sona.
"Well then, Sona-sama, who is he?" Grayfia had an obvious shift in mood as she turned really serious.
Sona didn't mind it and replied with her prepared answer, "He's a human and a friend of mine. Aside from that, I can't tell you anything else as I signed a contract to protect his secrets."
"A contract you say? It seems that he's hiding a lot of things." Grayfia furrowed her brows as she didn't expect this answer, 'Is she covering up for him?'
"He sure is, but it's not our right to pry on his private life," Sona answered like it was the most obvious thing in the world.
"Is that so? Too bad then." Grayfia then turned to Rias, "Milady, do you know the technique that he used earlier?"
Rias nodded and this surprised Grayfia as she was just asking just in case, "Did he tell you anything about it?"
Rias shook her head in response, "From Akeno's observation, he isn't too fond of us. He has no reason to tell us about it even if we ask nicely. But Koneko here knows how to perform it as he took a liking to her and taught it to her."
"What!?" Grayfia transferred her sights towards Koneko and asks, "Why did he teach you something like that?"
Koneko didn't hesitate to answer, "'Cuz he just felt like it." She didn't lie as it's technically the first reason he took her in.
Grayfia didn't know what to say after hearing that answer as it was too random so she instead asks her to perform it in front of her.
Koneko agreed as she couldn't see anything wrong with it. Koneko used Flash Step and reappeared behind Issei and Asia. Grayfia was astounded yet again at this skill.
Issei and Asia looked around as she suddenly disappeared and was scared out of their wits when they heard her voice behind them, "...boo..."
"Uwahh!... When did you!?" Issei and Asia almost fell back.
Koneko ignored them and looked back to Grayfia, prompting Grayfia to ask a question, "Can you use it successively as he did?"
Koneko shook her head and said, "It put's too much strain on my body. It's Kisuke-senpai who is strange. It probably hurts using it continuously but he can still smile and act so casual about it."
She didn't lie when she said that it puts so much strain on the body especially on her legs as she's experiencing it right now. She just misunderstood Kisuke and Yoruichi. Koneko thought that Kisuke is just sucking it up and didn't know that his body in whole another level that even he hugs a bomb and it explodes, he would only get a little hurt.
Another thing is Flash Step isn't perfectly translated to Senjutsu yet that Koneko needs to learn as Kisuke and Yoruichi are focusing on the development of the Reiatsu-Ki variant.
"So it's really a Senjutsu skill, but why does it feel out of sort when he uses it?" Grayfia muttered and tried to recall how Kisuke moved earlier.
"Out of sort? What do you mean?" Akeno asks because she's more sensitive on Kisuke's techniques than the others due to Koneko learning it. The more she knows the better it is for Koneko, she thought.
"They way he used it is a bit different from Koneko, although this can be attributed to differing mastering degrees. But the way he uses Ki is too different, almost as if he's using it in conjunction with other energy systems, while Koneko is just using Ki. As for the other energy system... I'm not sure what it is..." Grayfia replied to her as she continues contemplating, 'That unknown energy... although very weak, it almost like I'm instinctively fearing it... Just what the hell is that?'
"Do you know anything else about him?" Grayfia asks Koneko.
"Yes... I know more about him, but I'm also under a strong contract and I don't intend on breaking it like Sona-kaichou." Koneko voiced out resolutely. If she doesn't do so, she knew that Grayfia and Rias would try to get it out even if it means breaking the contract.
"Is there something he is hiding that can prove a disadvantage for the Gremory Household?"
"None." A simple and confident answer from Koneko.
"Haah... I guess I have to investigate him personally." Grayfia stared at her for a while continued speaking as she prepares to go away. She wouldn't get anything new anyways and the talk about rating game is already done which is her main objective. She intends to stalk Kisuke for a few days.
"I can't allow you to do that, Grayfia-san. I already promised him that I'll protect his secrets." Sona stopped her from leaving and let Grayfia know her stance in this matter.
"We've already noticed earlier, but why are so protective of him?" Grayfia is now very curious, along with Akeno and Rias who knew her from childhood. They knew that Sona wouldn't act like this without a very good reason.
"...Why?... Hmmm... Let's see... Let's just say that he may become a member of the Sitri Clan in the future." Sona thought that it would be funny to see their reactions if she tells them about Kisuke like this, and she wasn't disappointed. If Tsubaki is here, she'll probably cover her face and say, 'Urahara-kun already influenced you this much.'
This revelation shook all of them to the core. And Rias couldn't help but asks, "W-what do you mean by that, Sona?"
"I'm telling you that he's a candidate for being my fiancee." Sona flashed a smile at them, "So I'm reminding you all, don't touch him. He's mine." Sona flashed a bigger smile. She now can understand why Kisuke wanted to tease others somehow due to a variety of expressions her friends don't normally show.
In her mind, she's just using herself to shield Kisuke's secret, but she didn't know that her using herself to protect Kisuke is already weird enough, hence, their reactions.