The reactions of the people to Rozen's return varied, and their attitudes were diverse, but one thing was certain.
Once Rozen returned, Chaldea could truly be considered Chaldea, able to unleash its original functions and begin operating to save human history.
Given this, after the joy of the reunion, everyone immediately plunged into their work.
"Gather all technical personnel, prepare for Spiritron transfer, increase the analysis focus on the four previously observed Singularities, especially the second one. It must be prioritized to ensure intervention at any time."
Olga Marie issued such a decisive command, setting Chaldea into a bustling state.
Thanks to this, Roman and Da Vinci were both deeply involved in their work. One began inspecting the Coffins' operations, and the other, as the chief technician, coordinated all technical personnel. Today, Chaldea was like a long-absent powerhouse firing on all cylinders. Every staff member tightened their nerves, not daring to be the slightest bit lax.
On the other hand, Rozen and Mash received instructions to rest.
"Your task is to keep your physical condition in the best state, rest thoroughly before the Spiritron transfer begins, and await the summons from here."
Olga Marie unambiguously instructed both of them, promptly ushering Rozen and Mash out of the control room.
This was also a kind of tradition.
Before the Spiritron transfer began, as Masters and Servants who needed to intervene in Singularities, Rozen and Mash were the only ones allowed to rest. Because if they didn't rest well, there might not be another chance.
Even slight anomalies in their physical condition could affect combat and, consequently, the mission's progress, which was absolutely not allowed.
Therefore, even if Olga Marie couldn't stand seeing others being too idle, at times like these, she had to make Rozen and Mash rest.
Thanks to this, Rozen and Mash could finally have a proper reunion.
Now, in Rozen's room, the young man and young woman sat side by side on the bed.
Rozen was still wearing the coat.
In Mash's hands was Fou.
The two were engaged in conversation.
Or more accurately, Mash was speaking, and Rozen was earnestly listening.
"I see."
A little later, Rozen nodded as if he had finally understood.
"In this past half year, you've worked hard too, Mash."
Rozen expressed his admiration.
Just earlier, Mash had mentioned her efforts in training within Chaldea during these six months.
To ensure Mash could play a more significant role in battles, Chaldea had concentrated all its resources on her during this time, assisting her in enhancing her strength.
In the past, Chaldea's resources were evenly distributed among all Masters for simulated battles and training. However, with all other Masters frozen and Rozen leaving, these resources were now entirely focused on Mash.
With such support, Mash's strength had improved rapidly.
Originally, Mash hadn't fully tapped into the power entrusted to her by the unknown Servant within her. Despite her considerable efforts, she remained somewhat of a half-baked combatant.
However, under the rigorous training of the past six months, Mash had gradually uncovered the power within her, becoming considerably stronger.
Rozen noticed this almost immediately.
He observed a significant increase in Mash's strength.
If it were now,
"I'm afraid Mash has reached the level of a top-tier familiar."
This was the result of Mash's dedicated efforts over the past six months.
It showed that Mash was now much stronger than before, and she had put in much more effort.
"But I still haven't been able to unleash my true Noble Phantasm."
Mash expressed some regret and even a sense of loss.
Due to not knowing the true name of the Servant who entrusted her with power, Mash could limit the release of her Noble Phantasm's power but couldn't fully unleash its true potential.
Even after six months of rigorous training, Mash still couldn't unlock her true Noble Phantasm, leaving this mysterious treasure sealed.
"Da Vinci already mentioned that if I don't know the true name of the Servant who gave me power, I might never be able to unleash the Noble Phantasm."
Mash lowered her head, seemingly ashamed.
"Even though we agreed to work hard, I'm still so immature. I'm sorry, Senpai."
Mash seemed to be genuinely concerned about this.
"Don't say that."
Rozen patted Mash's shoulder, reassuring her.
"You've indeed become much stronger. Even first-class Servants wouldn't dare claim they're stronger than you are now. You've done really well, and you haven't disappointed me at all."
This was the truth.
Even Rozen hadn't expected Mash to elevate from her former status as a somewhat mediocre pseudo-Servant to her current level, comparable to a top-tier familiar, all through her own efforts.
If it were the current Mash, even facing a first-class Servant alone and emerging victorious is not an impossible feat.
Of course, even with Mash's current capabilities, it's still tactical-level strength. Achieving strategic-level strength would require more effort.
However,
"I haven't spent these decades idly."
Rozen smiled slightly at Mash.
"With me in command now, even if the opponent is a Beast-class, I have a way for you to defeat it."
Compared to Mash, Rozen's improvement was even more dramatic.
Therefore, facing the upcoming second Singularity, Rozen didn't feel overly nervous. Instead, he felt a more relaxed sensation than when heading to the first Singularity in France.
"We are indeed getting stronger." Rozen fearlessly declared, "Believe me; I have confidence that we can handle the next few Singularities."
Otherwise, these decades of time would have been in vain for Rozen.
Compared to the time when he went to the first Singularity, Rozen had indeed become much, much stronger.
Back then, Rozen hadn't mastered summoning upper-tier familiars, and he only had knowledge up to the seventh stage of the magus. His strength was quite weak.
Now, Rozen could effortlessly summon upper-tier familiars, had begun researching the summoning of top-tier familiars, possessed powerful tools like Onmyoudou and the Crimson Wing Formation, and could match strategic-class Servants even without using his trump cards, not to mention when he did.
Moreover,
"We are no longer just two individuals."
Rozen revealed a mysterious smile to Mash.
"Let me introduce you to our new companions, Mash."
With that, Rozen removed his coat and took off the silver ring from his left hand.
"Come forth, Kinu, Gyokuto."
At Rozen's summons,
"Clang—!"
The black coat and the silver ring simultaneously emitted a radiant light, transforming into a three-legged crow and a snow-white rabbit, appearing in the room.