Since everyone already knew their initial capabilities, it's really hard to show it when they've improved. And not just because they instructed them not to gather too much attention, but they also knew how detrimental it would be for others who were only beginning to learn the real use of Ki and Magic to show their development that is beyond common sense even in the world where they came from.
Sona doesn't want them to have an unrealistic outlook on the things they are learning. And it's not like they could show them their training method which is not only their guarded secret, but doing it without constant supervision from Serafall, Medusa, and Kisuke would only end up in an accident due to how dangerous it is.
One example of this is Koneko and Kuroka's Ki training that melds their inner Ki and the world's Ki together and circulates it through their entire bodies. The circulated Ki was so fine that each strand of it traveled through each muscle fiber.
It's not just the method of circulating Ki that was very dangerous and very far from the usual method of TouKi which was just covering the entire body of a layer of inner Ki, but the melded Ki itself was something disastrous that any loss of control would devolve the user into an unthinking monster.
But even with those unconditional dangers and risks, it could be avoided with the proper supervision of someone experienced. And if those disadvantages could be taken care of, the results and gains are beyond what could be imagined using normal methods.
Kisuke hypothesized that their Ki training could be potentially on the level of Issei's Ki training that was taking advantage of Dragon Aura and using Ophis's power and Samael's blood, or maybe, even surpassing it.
Similarly, Sona and Aika were also undergoing unconventional but effective training methods.
In any case, even if they have become stronger, they can't really show the full extent of their capabilities now. If they were to move to a new place where no one knew them, they wouldn't have to care about what everyone was thinking or seeing.
Of course, Akeno and Irina were envious of this as compared to them, they couldn't see their improvement at all aside from their bodies getting sturdier and sturdier each day.
Serafall, on the other hand, was against their training methods before, but not long after, she joined Sona since it was also very helpful with what she's been trying to master for decades.
.
.
.
After their breakfast, Kisuke left again to take care of all the things that needed to be done before they left. "Now then, let's put down some hidden formations before I leave. It might prove useful later."
It wasn't until late afternoon that Kisuke finished his work. Since he couldn't be satisfied if he just did it within Orario, he expanded his work a few tens of kilometers beyond the walls of Orario and this included the entirety of Melen too.
'Besides, this is the best chance to hide something within those hidden formations. That should cover most of my needs in the future.', thought Kisuke as he made his way home. A few moments later, he spotted several familiar figures and stopped on top of one of the buildings to see what's going on.
On the left side was Sophie, who seemed to be making her way towards the Hearth Manor, 'It looks like she decided to come herself. That's not a problem but...' He then looked towards his right and saw Line going to the same direction. However, not far from behind her were Ais and Lysa, who was in the former's backpack, were following Line quietly, 'What are they up to now?'
Kisuke has a feeling that it would be troublesome if he let Ais and Lysa reach the manor so he immediately sent a telepathic message to Line, 'Don't turn your head anywhere and don't stop walking. I will cast Magic on you but you should just ignore it.'
Line's steps halted for a very brief moment. A second later, she felt Magic Power covering her entire body and as much as she wanted to stop and study it, she continued walking as if nothing was happening.
From Ais's point of view, Line suddenly started releasing Magic Power. Thanks to the training she's doing, she was already able to tell minute fluctuations on Magic Power which was very useful in predicting her opponent's next move. However, she still couldn't tell what kind of Magic was being used despite knowing something is being used.
While trying to guess what Line was about to do next, she suddenly turned a corner, 'She's not going to the Hearth Manor?' she asked herself as she kept following her. A few minutes later, Line arrived at a certain Library and started browsing books, 'She's studying now? But why here?'
The reason why Ais started following Line when she saw her leave is because of the feeling that Lysa was giving her that if she doesn't follow her now, she's going to regret it later. Although she doesn't know how she's going to regret it later, she chose to go with what Lysa has been trying to tell her since it didn't hurt to do so.
Ais and Lysa watched Line looking through the books until late at night from the corner of the library until Line's figure suddenly started to become hazy and disappear entirely.
Astonished, she immediately stood up and checked the place where she was sitting not long ago but couldn't tell anything. She looked around and saw the similarly shocked expression of those within the library and figured out that she wouldn't get anything even if she was to ask them.
Out of concern that Line was in danger, she immediately went home and came to the lounge where Loki, Finn, Riveria, and Gareth were discussing what happened today and their future plans, "Loki! Line disappeared!"
While Finn, Riveria, and Gareth's expressions became serious, Loki nonchalantly asked, "How?"
Ais then told them what she had been doing until Line's disappearance.
Whilst they wanted to know why Ais was secretly following Line, they are more concerned with Line's safety, "She just suddenly disappeared from your sight?" asked Riveria.
But as Ais nodded, Finn suddenly said, "Let's just ask Loki since it seems that she already knows what happened." He noticed that Loki was still indifferent despite hearing Ais's story.
Clearing her throat, Loki answered when everyone turned their heads to her, "Ehem... Looks like I failed to mention it, but the entirety of the Hestia and Artemis Familia's are leaving for the Dizara Region. Line-chan wanted to go with them since she's Kisuke's student, so I allowed her."
Ais was stupefied and didn't know what to say. Riveria, on the other hand, sighed and held her forehead, "You should have at least tried to tell us about it."
But even knowing about it, she knew she couldn't do anything to stop them. Realizing her thoughts, Riveria asked herself internally, 'Stop them? Why would I even think about something like that?'
Shaking off her head with these 'useless' thoughts, Riveria continued, "So Ais was fooled with an Illusion Magic."
"That's probably what happened. Line-chan still can't do Illusion Magic that would fool Ais-tan, so Kisuke might have noticed her following Line-chan and did it for her."
"...W-why?" Ais asked with an incredibly confused expression.
Loki looked at her but instead of answering her question, she asked her another, "What would you do if you knew they were leaving?"
"...I..." Ais couldn't answer her. But deep inside, she knew her answer was. She just didn't have enough courage to say it.
Riveria sighed yet again, "That's enough Loki. I'll accompany Ais to her room."
After the two of them left the room, Finn couldn't help but say after recalling Riveria's back as they left, "I knew Ais wouldn't want it, but to see even Riveria dejected. Is it that man's knowledge and wisdom or his strange charm?"
Gareth chuckled while stroking his beard, "Don't ask me since I also don't know anything regarding that. But we could say there's a good reason why women gather around him." He then took a peek at Loki who was gritting her teeth, "There's no point in getting angry, Loki. From the start, you knew that this was inevitable. No need to fool yourself."
"Kuuuhh!!! I'm happy for Riveria, but my Ais-tan!!!"