That is, the Demon Slayer Bloodline and the Monster Cell Bloodline.
Although the Monster Cell Bloodline had not yet shown any effect on Aizetsu before being purged by the Workshop, the Demon King Bloodline on Juro was indeed very useful.
As long as they fuse, Kisaragi Rin, who obtains this bloodline, will immediately lose her physical weaknesses, gain flesh and blood manipulation, infinite stamina, Blood Demon Art Skills, and various attribute buffs.
Busujima Saeko had obtained Moon Breathing, Blood Demon Art - Formless Sword Energy, and Transparent World from Kokushibo at the time, but she had never used the bloodline. The Veronica Virus was merely a reinforcement.
Kisaragi Rin chose Busujima Saeko to be the first Guardian Spirit of his Divine Warrior Body. Now, he wanted to ask Busujima Saeko for her opinion on acquiring a bloodline.
"Do you want to choose a bloodline?"
Kisaragi Rin placed the two bloodlines in front of Busujima Saeko. "With the Workshop here, no matter which one you choose, you can always change it if you're not satisfied."
Also, because the Workshop was there, Kisaragi Rin didn't care too much about who became his Guardian Spirit.
After all, even for Hanako, who was an R-grade, Kisaragi Rin was confident he could cultivate her to be unparalleled in the world.
Of course, there were only four slots, so Hanako wouldn't get such an opportunity.
From any perspective, Busujima Saeko was Kisaragi Rin's priority.
"Then, I'll take this one."
Busujima Saeko picked up the Demon Blood.
Half of Busujima Saeko's power came from Kokushibo of Demon Slayer, so it was natural for her to choose this familiar bloodline.
Of course, she might also just be afraid that her monster form would be ugly.
After she made her choice, Kisaragi Rin accompanied her to bathe and change, then they went to the Workshop to prepare for the bloodline acquisition.
Since Kisaragi Rin used the Demon King Bloodline, which eliminates the defects of Demon Blood, on Juro, the compensation given to Kisaragi Rin by the Paradise after purging Juro also had no side effects.
Although Kisaragi Rin trusted the credibility of Paradise's products for this flawless Demon Blood, he still brought Busujima Saeko to the Workshop to prevent any accidents.
"See you later, Saeko."
"See you later..."
Busujima Saeko closed her eyes and fell into a deep sleep, and the Demon Blood began to merge with her under the power of the Workshop.
Demon horns grew from her forehead and then disappeared, purple hair turned white and then returned to its original color... Through the connection of the Divine Warrior Body, Kisaragi Rin perceived Busujima Saeko's aura steadily increasing throughout her body, only then did he feel relieved and began to examine the current Workshop.
The Workshop's portals had become three, with the extra one leading to the new territory, Ryudoji Temple.
And all the miscellaneous Items he casually threw into the Workshop were neatly arranged in the right corner of the Workshop.
Hmm... corpses, living people, cars, Paradise's Equipment and Items, and even a golden box containing a Starving Ghost were all here.
Since the things Kisaragi Rin threw in were quite diverse, the difficulty of this job was no less than sorting express deliveries late at night.
"By the way, Darwin is a Curly-haired Baboon."
"Darwin also said I'm a Curly-haired Baboon."
"Now I've even joined the Chiba Zoo..."
Kisaragi Rin rubbed his chin, thinking of the players he and Mitsuri Kanroji saw at the zoo before. Fortunately, he was S-rank and didn't need to find a cage to experience the "workplace culture" of Chiba Zoo.
Just then, Haibara Ai walked out of the bedroom, rubbing her eyes.
Haibara Ai: "Hi."
Kisaragi Rin: "Hi."
After greeting, Haibara Ai bypassed Kisaragi Rin and continued her research.
Kisaragi Rin: "..."
This guy was a bit too perfunctory.
Moreover, Paradise's operations were basically idiot-proof, so why did she have so much to do here?
"Why don't you go outside?"
Kisaragi Rin asked directly. He hadn't seen Haibara Ai at dinner earlier, and he thought she had gone out to play with those elementary school classmates.
"Because the Workshop has food."
Haibara Ai yawned, stretched out her hand, and a Banana appeared in it.
Her mental state was quite poor because Anya had dragged them into forming a detective club today, claiming they would challenge the famous detectives of Tokyo and Osaka with the help of the dog's Prophecy.
Facing such things... Haibara Ai felt that one day she would turn into Dr. Eggman from Sonic the Hedgehog.
"Saeko is strengthening? So you've already left that city called Fuyuki City?"
Haibara Ai noticed Busujima Saeko, and only then did she realize that Kisaragi Rin's Dragon Ball War had ended.
"You should call her Sister Saeko."
Kisaragi Rin angrily rubbed the Loli's dog head. Is Saeko a nickname you can call?
"..."
Haibara Ai didn't want to speak. She pulled out the R'lyeh Text from the corner and asked Kisaragi Rin strangely, "What did you do with this guy? Before, it was screaming like an idiot, but after you came back, it became very quiet."
"...I didn't do anything, did I?"
Kisaragi Rin thought for a moment. Didn't he just use this guy to summon Shikanoko Noko once?
"You scoundrel! You did such an excessive thing to me! And you still pretend not to know!"
The large white mouth on the cover of the R'lyeh Text started screaming again, even with a hint of a sob in its tone.
This crying made Haibara Ai look at Kisaragi Rin with a strange expression.
"So, what exactly is the activity of this thing?"
Kisaragi Rin took the R'lyeh Text from Haibara Ai's hand and tried to open the book, which resulted in the R'lyeh Text's sharp and continuous screams.
Haibara Ai covered her ears and said, "I don't know... For now, we can only confirm that this consciousness has no Ability to harm others. As for the origin of this consciousness, perhaps it's an outsider, or perhaps it's a spirit born from the book itself, like a book spirit..."
"...Strange thing."
After a while of stalemate with the R'lyeh Text, Kisaragi Rin still held back his strength before it cried.
Crying and such, it's too troublesome.
Of course, the enemy's crying is still very pleasant to hear.
Seeing Haibara Ai put on rubber gloves again and begin directing the Workshop to do her research, Kisaragi Rin watched for a while and asked confusedly, "What are you researching?"
As the Workshop Master, Kisaragi Rin had the authority to recruit staff for the Workshop.
Haibara Ai then received the position of Workshop Assistant.
As for a higher position, namely "Researcher."
The Workshop prompted that an "Assistant" must independently complete a valuable research project to be granted the title.
As for what level of research results counted as valuable in front of the Workshop, it didn't say.
Since gaining authority, Haibara Ai would appear here to do her research whenever she had free time.
"Do you still remember APTX4869?"
Haibara Ai asked.
"The shrinking drug?"
APTX4869, the drug that made Haibara Ai shrink and meet Kisaragi Rin, was described in the Workshop's research report at the time as having powerful lethality and anti-divination/anti-Prophecy effects, making it an essential Item for various mysterious organizations' murders and crimes.
"Although I was a Researcher for APTX4869, in reality, I was never the only Researcher in the Black Organization. Since we were researching, we naturally had to understand the direction of the drug's research, and the people in the organization required me to research immortality through APTX4869."
Haibara Ai explained her experiences, and Kisaragi Rin nodded.
In the Original Plot of Detective Conan, the Black Organization's purpose in researching drugs was indeed related to immortality.