Actually, the Rinnegan also possesses similar abilities, like the Asura Path used by Pain. This path has mechanical capabilities, with weapons such as guns and missiles, all with immense power—so powerful, in fact, that it can even shatter a Chibaku Tensei - Planetary Devastation with a single blast.
Thus, the Asura Path's abilities are in no way weaker than the hodgepodge of weapons created by Dr. Stylish, and are even much stronger. Moreover, the stronger the user's abilities, the greater the power.
Kaguya's evolved eye techniques could not only grant others the Asura Path's abilities but could even virtualize these abilities. In other words, there was no need to amputate limbs and transplant weapons into the body; instead, she could bestow this power directly. Although the recipient's body would still be modified, this method was far less crude and brutal.
The most crucial aspect was that there was no need to worry about the consumption of ammunition, as these were all generated from chakra, or rather, energy. This eliminated many of the complications.
However, during the modification process, there were still some difficulties.
"Ah, ah, ah."
Seryu's cries were like those of a kitten, soft and low.
Outside the door, a beautiful black-haired girl leaned against the door, biting her rosy lips. She gripped her sword so tightly that her knuckles turned slightly white, her eyes burning with a fierce intensity as if she was ready to cut someone down.
With a "clang," a round metal ball fell to the ground, spinning twice before bumping into the brown table leg and coming to a stop.
"Phew." Kaguya wiped the sweat from her forehead and exhaled a breath of relief. She had finally removed everything from Seryu's body, which turned out to be much more complicated than she had imagined.
Especially when she looked at the pile of parts scattered on the floor, Kaguya couldn't help but twitch her mouth in disbelief. How could so many things have been crammed into a girl's body? And according to Seryu, she had installed all this equipment by herself. It was simply unbelievable. With so many firearms, weapons, and ammunition inside her, it was a miracle that Seryu hadn't blown herself up.
Thinking about this little girl walking around with what was essentially a small nuclear bomb inside her, carefree and oblivious, Kaguya couldn't help but feel a deep respect for her. No one else could have been so reckless to such an extent.
At that moment, the girl was lying on her back in bed, with the gentle morning sunlight streaming through the window, casting soft, silky rays over her.
She was different from other girls Kaguya had seen. She might not be as beautiful as Kurome, or as voluptuous as Leone, or have skin as flawless as Sayu's, but she had something that other women couldn't match.
That was her extremely slender figure—not the kind of skinny that's flat and frail, but a curvaceous figure, especially her legs, which were long, firm, and perfectly shaped.
But Kaguya wasn't in the mood to appreciate these things at the moment. She was exhausted, nearly dead on her feet. Extracting all the things from Seryu's body had been strenuous enough, and then giving her new abilities had been even more draining. It consumed not only her chakra but also her mental energy. If not for Kaguya's strong ocular powers, she might have collapsed long ago.
Kaguya quietly walked to the window. By this time, Seryu had fallen asleep, breathing softly, with traces of fatigue still lingering on her face. The surgery had been no easy task. It wasn't too bad for Kaguya; it just made her tired. But for Seryu, it was much harder. To ensure the success of the treatment and prevent any nerve damage, no anesthetics could be used, nor any genjutsu, not even unconsciousness was allowed.
The fact that Seryu underwent surgery while fully awake, without passing out from the excruciating pain, greatly surprised Kaguya. Such bone-deep pain isn't something an ordinary person could endure.
The surgery had taken around five or six hours, and by the time it ended, it was already morning. Kaguya finally understood why doctors were often exhausted after performing surgery—it was incredibly tiring, especially when you had to maintain intense concentration for such a long time. Not just anyone could endure it.
Kaguya let out a long sigh of relief, stretched her lazy body, and pushed open the door to walk outside, only to find someone standing there.
"Kurome, what are you doing here?" Kaguya asked, somewhat startled.
Kurome crossed her arms and gave a light snort, turning her head away with a slightly puffed-up expression.
"Clang," a sound rang out as something dropped, and a circular metal ball rolled on the ground, spinning twice before hitting a brown table leg and coming to a stop.
Kaguya blinked, realizing something, and couldn't help but feel like laughing.
What a cute little jealous pot.
Ignoring Kurome's resistance, Kaguya pulled her into her arms and gave her a deep, tongue-twining kiss, only letting her go when Kurome was almost out of breath.
"Come on," Kaguya pinched her rosy cheek and chuckled, "Let's go have breakfast. I'm starving after working all night."
What's this? Treating her like a child? Does she think I'm so easy to placate?
Kurome thought indignantly, but her hand still subconsciously reached out to hold Kaguya's as they walked downstairs together.
"Good morning, Your Highness," the three sisters greeted her obediently.
"Yes," Kaguya nodded, sitting down at the table. "You don't need to busy yourselves right now, join us for breakfast."
"Okay."
Ail's cooking was as good as ever. She knew Kaguya preferred light flavors, so most of the dishes were light and aromatic, filling Kaguya's mouth with a delicious aftertaste, leaving her full of praise.
Because Kaguya had expended a lot of energy last night, her appetite increased significantly.
Kaguya wasn't strict, nor did she have the air of a princess. Her temper was mild, so everyone was relaxed and at ease. Talking and chatting at the dining table was a regular occurrence.
Normally, the three sisters would be whispering and giggling non-stop, but today seemed different, especially for Fahr. The usually lively girl seemed a bit distracted, as if something was on her mind. She kept sneaking glances at Kaguya, looking guilty.
Kaguya couldn't help but laugh silently. It seemed that this little one had realized something.
But now, it was too late to regret it.