When Katsu to the Palace arrives, despite never meeting any of the guards, they seem to be very respectful to him and let him in. He even detects other hidden emotions like fear when they look at him. For all of his students, the only person he can think of that makes them afraid should be Esdeath.
She may have already told the current Emperor about his appearance, so they won't stop him from visiting their place.
In the past, when he meets the old Emperor, he discovers that he is an intelligent, wise, and kind person. He is truly aware of the corrupt nature of the Empire, but the corruption is already rooted in the core of the place. He was only a puppet, with only General Budo truly loyal. Once he tries to change it, the whole empire will be destroyed, so he needs many talents to replace the positions of former leaders.
The trade that he did with Katsu was a bet, knowing he wouldn't live long with so many people ready to backstab him, so only General Budo and he knew about the Katsu group's existence, as he bought them more time for them to fully grow the moment he died. That was when their training time was up.
After he died, that was when the purge happened. With only Esdeath, she can easily destroy those bugs because she is already equal to an army if she is prepared, but to maintain the Empire, the whole group still needs to act.
Even though Leone looks like she is enjoying life in the bar, she is still doing killing and intelligent gathering tasks. The bar they meet is actually a place to gather intel from the bartender and for them to exchange information with each other.
Still, the most shocking change for him to witness is meeting the current Emperor, or, to say, Empress.
The Empress is a young girl with green, shoulder-length hair that was braided on the sides and green eyes. She wore a purple dress with white boots and a blue mantle, as well as a large headdress. She also carried a golden scepter with a blue orb attached to it. With Grand General Budo standing next to her unfazed by Katsu's appearance.
Katsu always thought that the current Emperor was a boy, like the original, but looking at the dress, unless he liked crossdressing, this was a girl.
"I am honored to meet you, Katsu, the teacher of the heroes that cleanse corruption. The Empress stands out of her chair, curtsying to him, showing a princess manner.
"It was my honor to meet your majesty. Their achievement is their own effort. I only help them a little, "he said humbly.
"I want to talk to you more, but from the looks of it, you have your own task, so I won't be keeping you here any longer"
"I hope we will meet again, Empress," he said, bowing and leaving the room to find Green.
Green place is a normal room to manage documents and intelligence nothing special, but usually, only Womyn is here. Another room is in a secret passage from his room to a lab where he does experiments and invents.
When he arrived at the secret lab as instructed by Womyn. The lab is very big with many body parts of Danger beasts in a cryogenic tube while many Teigu is storage here. He was greeted with the sight of Green experimenting with many colorful tubes. Standing next to him was Dorothea, an alchemist with many body modifications.
She had the appearance of a young woman of small stature with blonde hair; this hid her true age as a very old woman who had extended her lifespan by stealing energy from other people. She was definitely a dangerous person, but Katsu trusted Green to keep her alive only to aid him with his experience while restricting her from doing anything like killing.
"Green here is your order." Green only takes the tubes while giving the herbs to Dorothea.
"Don't try to do anything behind my back or you know the consequences." Dorothea shudders, knowing the consequences he mentions are Esdeath tortures.
Even though Esdeath isn't as cruel and depraved as the original, she still likes to torture enemies and anyone who is disobedient, so it's no surprise Dorothea went to an Esdeath session, which made her very obedient.