Kiba, Koneko, and Akeno, Sato had handled the three of them, and naturally, among all of them, his focus was definitely on the leader of this team, Rias Gremory.
"Come on! Give me everything! I am ready!"
"....." Sato.
Unlike Issei, the silly pervert boy, Rias knew that Sato was smart and witty, so she had an expectation that he knew how to make her stronger.
"Before I start the training, can I ask if those three are your Peerage members alone? Do you want to complete your Peerage?"
At least, even if the new members couldn't help much, they could buy time for all of them, Sato thought.
"...I have another member, but he is a bit..."
When Rias thought of her Bishop, she sighed helplessly.
"Is there something wrong with him?"
"Well... he has a mental problem, and he is a shut-in."
"So, he won't come out of the room?"
"Yes." Rias nodded. "But, instead of a room, he won't come out of a cardboard box."
"Cardboard box?"
"He loves to stay in the cardboard box."
"..."
Sato was silent for a moment, then asked, "Is it not possible for him to fight from inside the cardboard box? Even if he can't fight, can he support you?"
"That's..." Rias thought for a while and thought of everything about her Bishop, and the conclusion that she came up with was—
"...it seems possible for him to become a support."
"Is it?"
"It is."
"..." 2x
"...should I bring him?"
"Well, let's do it later since I want to focus on your training first."
"Okay."
"Before that, can you tell me more about your speciality?"
"Speciality?"
"I mean, do you have a certain area that you are best at, or do you have an innate ability that comes from your family, or anything that you are confident with. It can be anything, and I will judge how you train yourself based on that information."
"I guess, it is my Power of Destruction."
"Power of Destruction?"
"Yes." Rias nodded with a hint of pride, yet also a strange sense of inferiority that somehow emerged in her eyes. "It is the power that I have inherited from my mother."
As a devil, it was obvious that she had a certain innate ability, like how Beelzebub could control the flies; in her case, her power was to control the power of destruction, which was a type of Demonic Energy that was destructive by nature, granting its users great offensive power and could completely annihilate things when used.
"Can I see it?"
"...sure." Rias hesitated, but while she couldn't control it well, she could use it with minimal effort, so she released it—a small ball of destruction.
Bzz!
"Hmm?"
Sato watched the small ball of destruction that moved toward the grassy ground before everything was annihilated, disappearing into nothingness.
"It's like a blackhole."
"What?"
Hearing his comment, Rias was confused, but then her eyes widened as she saw him stretch his hand toward her power of destruction!
"What are you doing?!"
Yet, Sato didn't seem to hear her voice and just grabbed the small sphere of the power of destruction in his palm tightly.
"It isn't absolute."
He thought that the power of destruction was an absolute force that would annihilate everything, but it seemed that wasn't the case, since if one had a stronger power than the power of destruction itself, they could destroy it.
Also, the way the power of destruction worked was by tearing apart the matter, destroying it, and making it vanish from the world, but as his physical ability was stronger, it could only try to pull him in before it disappeared from his palm, as the demonic energy, the magic power of the devil, that supported it, was consumed.
"In the end, it's all about energy."
Still, more or less, he understood the power of destruction wasn't as omnipotent as he thought it was.
In this world, the power of destruction was the symbol of power; it was the power of the king, yet frankly, if the user was shitty, they would be as good as a loser, especially when there were a lot of weaknesses within this power.
First, it was so damn slow.
Yup, the power of destruction couldn't move fast, unlike the power of light, which has the fastest speed in the world.
Second, it required a significant amount of energy to support it.
If the user of this power had a small amount of Demonic Energy, this power was as good as a loser.
With all of that, what were the advantages of this power, then?
First, it possessed great offensive power, as it would destroy all matter that came into contact with it.
Yet, this also raised a question: what if there was an attack that didn't have a form, such as a mental attack or a ghost, an incorporeal existence? Would they disappear when they were attacked by the power of destruction?
Still, that question aside, the second advantage of the power of destruction was that it contained an attraction, like a black hole that he had said before.
If one's speed was so fast, then they would be more or less okay, but if a speed wasn't one's advantage, they would be pulled by the power of destruction, torn apart, and disappear from the world.
Still, while it was dangerous, if one had enough physical ability or a certain unique magic, ability, or other type of powers that could make them defend against the power of destruction, then they would be okay.
Unfortunately, he had no such power within his body, nor did any of the other Satos have such a power to defend themselves against the power of destruction.
Yes, he had the Kinesis, which made him able to absorb the kinetic energy, and made all attacks that relied on it to become useless, and even became part of his power, yet the power of destruction didn't rely on the kinetic energy; it was another type of power that was troublesome to handle, so if Rias' increased the energy within that power of destruction, he would run away directly instead of grasping it with his palm.
His physical ability might be able to defend, but his palm was a bit red since even with just a small amount of Demonic Energy, it was still dangerous to hold it, and he recommended that no one mimic what he did, as their palm would definitely receive a hideous wound.
'I wonder whether there is a power that can help me to defend against it.'
Sato thought for a moment, then shook his head as he was still new in the supernatural world, and because of that, he was eager to grow stronger.
Still, with his super regeneration ability that Sato MHA got from Number 6, his palm was as good as a baby's.
'It's good that he took the power of Number 6.'
If possible, Sato also thought to use the power of All-For-One to get the power that interested him, and would he be able to steal the Sacred Gear, too?
He wasn't sure, but... would it be wrong to test it?
As he had the idea, he knew who he should meet, but as he thought of his bright future, he turned his head and saw Rias, who kept staring at him in a daze.
"What's wrong?"
"..."
"WHAT THE HELL ARE YOU DOING?!"
Yup, Rias was so mad.