Three months after the war in the Holy Land...
Katahara was at the Adeptus Mechanicus facility.
Alongside Judge, the Fabricator-General.
Judge: I can't believe that energy source is Uranus. To think it's capable of destroying an entire country.
Katahara: Halt all projects to analyze that thing. Don't you think it's going a bit too far?
Judge: All the Great Masters would have revolted against me if I didn't involve them in this project. First Pluton, and now Uranus. Two ancient weapons in our possession...
Katahara: Drust infiltrated deep into Mary Geose to obtain it. He mentioned there were some people in stasis capsules, but unfortunately, he couldn't free them.
Judge: Stasis chambers, none of that compares to what we have before us. Just imagine the level of power an weapon would have with that thing as its reactor. It pains me to think about how much it will cost us to create that.
Katahara: I suppose Vegapunk's projects don't offer any solutions.
Judge: Lineage Factor, Devil Fruit creation, Cyborg creation—those are all child's play compared to Uranus. Just think of the possibilities. We could have an unlimited source of energy.
Katahara: I suppose the study of Big Mom's body has concluded.
Judge: Just before they handed us Uranus, my division was responsible for studying that monster's body. There's only one word to describe it: monstrous. I could explain everything we discovered, but it's not worth saying. I advise against trying to recreate the specimen.
Katahara: Keep the data along with the Seraphim. No one except you and me is allowed to know about it or lay their hands on it.
Judge: As you wish. No one is permitted to access that level of information, Level 0.
Katahara: As a final gift, take this. Adapt it to your liking.
He revealed the Goro Goro no Mi.
This fruit takes the form of a large golden pineapple with elongated aquamarine leaves. Additionally, it has spirals (like all Devil Fruits) ending in slightly pointed tips.
Katahara: With this, I take my leave. I leave you with your new toys.
While Judge held the Goro Goro No Mi.
Judge: Just imagine the possibilities.
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Five months after the war in the Holy Land, Katahara was with Ryu and Dragon.
Katahara: As promised, the poison.
He handed over a green vial.
Dragon: This little thing ended the lives of two people at the pinnacle of the world. Well then, let's get to the point.
Ryu: We will grant you a position of power, just below me in the new government, if you prefer.
Katahara: Thank you, but no thank you. I only ask that Wano and its surroundings be treated as the land of the Kozuki Family, free from any foreign interference.
Ryu: So, that's your decision.
Katahara: As I told you, my time in this world is coming to an end. Although I would like to stay, it's impossible for me.
Dragon: The incurable disease... I didn't think you contracted it.
Katahara: Perhaps, perhaps not.
Ryu: So, where will you go?
Katahara: I haven't decided yet, but I won't bring my people to fight my war. I will only take a select few with me.
Ryu: I guess this is goodbye, then.
Katahara: Nothing is goodbye. Destiny is unpredictable.
Dragon had no idea what the conversation was about, so he remained silent.
Ryu: I promise that Wano will not suffer when you're gone.
Katahara: If my student has any problems in his kingdom, then and only then can you intervene.
Ryu: So, your student. I didn't think you had that kind of sentiment as a teacher. Very well, it shall be done. I will only intervene if your student faces a problem beyond their control.
Katahara: Thank you.
As he stood up from the table to leave the place.
Dragon: Before you go, why don't you tell us about the proposal you made to Kuzan and Kizaru?
Katahara: Now that they are out of a job, I am simply offering them a new one, one that is much simpler for lazy people like them. I'm sure they will be tempted to accept it.
Ryu: Forget about it, right now we don't have time to worry about those kind of things, them secretly hunting our commanders with money... we have to take care of establishing our organization quickly.
As Katahara transformed into dozens of crows and disappeared from the place.
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Katahara was alone in his training room, six months after the war in the Holy Land.
Katahara: System, show me the notification screens from that day... I can't believe it took me six months to open the system and see my rewards.
[System Response: You eliminated a creature from the Warp, a creature that should not exist in this dimension. No Reward... creating reward... congratulations, the host received as a reward (blueprints of the Vastagos Tempestus facility {Schola Progenium}) (Biological Implant blueprints {Vastagos Tempestus}).]
Katahara: Vastagos Tempestus... this changes the plans...
As two tubes filled with blueprints and instructions appeared in front of him.
Katahara: Just by looking at the blueprints, I get an idea of how extremely expensive and complicated this project will be. Damn, just the thought of one of these Vastagos Tempestus rebelling... it seems I'll have to create a brainwashing facility. Religion can't be the only form of brainwashing. I'll give them to Judge, but not now. I'll keep them with me. Perhaps in a few years, I can give them to Judge for analysis.
[System Response: The host ended the life of Fingerland Shanks (Akagami no Shanks), Captain of the Red Hair Pirates, with a bounty of 4,048,900,000 berries. You have received a total of 2,000,000 CP.]
Katahara: Not bad, not bad. A well-deserved reward for Shanks. It's a shame he couldn't die in a more honorable way.
[System Response: The host has fulfilled the condition to travel to the second World. Please choose the World and date you wish to be sent to.]
Katahara: It seems it's time for me to leave... tell me how I can take with me whatever I want from this world...
[System Response: Anything bearing the symbol of your engraved flag will be sent along with you to the next World.]
Katahara: Excellent. The time to leave this world is getting closer and closer.