“The Black Knights have Japan’s best interests in mind,” Kirihara said. “Or perhaps it would be better to say that they have Britannia’s worst interests at heart. In either event, you can rest assured: They shall act towards Japan’s liberation!”

“Sir!” a new voice yelled, bursting into the room with sweat dripping down his face. Not from exertion, but rather fear. Under normal circumstances Kirihara would have been furious for the intrusion, but the next words out of his mouth… “General! An emergency situation has arisen! According to our advanced lookouts, Cornelia is advancing towards our main base!”

“Our main base?!” Tatewaki gasped. “Now of all times?! How did this happen?!”

“Don’t you see?” Kusakabe sneered. “It’s a trick! The Black Knights arranged this meeting so they could distract us, betray us to Cornelia!”

“In which case, you must find a way to kill me before I kill you!” Zero swept out her hand across the room in a big sweeping gesture. “If not, you must join with us instead! The Black Knights are not your damnation, but rather your salvation. Where false hope gives away to paranoia and suspicion, true hope shall prevail.”

“In that case, I can see no problem in lending you a little gift,” Kirihara said, and by the gods he was almost laughing. He couldn’t remember the last time he’d had to restrain himself like this. “Make good use of it, Black Knights. It will guide you well along the path of blood, but be warned that when you walk it, you never walk it alone!”

[...]

But now, with no other distractions and all the information he could possibly need simmering in his brain, he had all he needed now. His goals would be met. It would be a trivial task to use Diethard to leak the details of the JLF’s base to Cornelia, and she would jump at the chance to put them down rather than let them ally with the Black Knights.

This would be her undoing. She would wipe them out for him, in the process leaving herself vulnerable to his own attack. In that sense you could say the damage was already done! Why, even if she struck at them this very instant the arrangements were already made. Kyoto would have no choice but to meet with the Black Knights if they wanted any chance for Japan to be liberated from Britannia. No matter the outcome, he could play it to his benefit. He would have Stand users. The resources of Kyoto. And if he was especially clever he might even retain the tactical genius of Tohdoh the Miracle Worker.

-Lulu's Bizarre Rebellion Chapter 24