Esdeath might seldom appear in the novel after the Black Bullet arc and some people might even forget about her, especially after the Fate/Apocrypha arc since that arc was very long and it ended with at least a hundred more chapters, but in truth, Haru and Esdeath often met each other since he often teleported to Esdeath's world.
There were a lot of reasons why Haru went to Esdeath's world, the first reason was that he was an Emperor and as an Emperor, he needed to take care of his Empire. It wasn't that he didn't believe in his ministers, but they needed a direction to guide Empire to become the strongest country in the world.
Haru also wanted the people in the country to have a dream and they had hope for life. Unlike when Honest was in charge of the country before, he wasn't stupid and knew how to make his country prosperous.
Esdeath might be his wife and she was also the queen of the Empire, but she didn't have the talent to govern a country. She might be a fierce general that was capable of destroying a lot of opponents or a country easily, but she was too lazy to govern a country and left everything to her husband.
Haru knew that even though Honest had been thrown out, the Empire still had a lot of problems, especially because of surrounding countries.
Even though Honest had died, this guy had left him with a lot of problems that he needed to solve, however, he didn't feel worried since as long as he was the Emperor, no one could shake the domination of the Empire.
That was the first reason and the second reason was because of Esdeath.
Esdeath was his first wife after all so Haru often went to meet her.
In Haru's world, a lot of days and months might have passed, but in Esdeath's world, a month hadn't passed since his coronation as an Emperor, but even so, a lot of his ministers urged him to make a lot of children which made him helpless.
But enough of that since Haru was startled when Esdeath suddenly asked him to have a duel with her.
Haru: "Duel? Why?"
Esdeath: "I have heard that you have received an interesting power and that power is also a counter for my ice manipulation."
Esdeath: "I want to test it."
"....."
Haru let out a sigh and felt quite troubled by Esdeath's request since she became powerful at a very fast speed, especially after she had gotten a Sode no Shirayuki in the previous quest.
It wasn't Esdeath's first time asking him for a duel, and they had fought a lot of times, but with each fight, he could feel Esdaeth's progress which was very scary since she became so strong that it took him all of his power to defeat her.
Haru's description of Esdeath's power wasn't exaggerated since she was really powerful, especially when his "Horo Horo no Mi" was easily countered by Esdeath's Sode no Shirayuki.
With the power of "Horo Horo no Mi", Haru could perfectly escape from any physical and elemental attacks, however, Sode no Shirayuki was a weapon of God of Death on the world of Bleach which meant, this weapon could attack the soul.
His "Horo Horo no Mi" was able to turn him into an astral mode and turn his body into a soul-like state, but that state was useless in front of Sode no Shirayuki and that was the reason why he needed to use all of his power to fight Esdeath since he didn't use his "pleasure magic".
With his "pleasure magic", Haru could defeat Esdeath easily, but he didn't see the fun in that since this ability was very cheating.
Esdeath's ice manipulation ability was very scary and she could even freeze the time itself or rather, she might develop her ability to be able to freeze something conceptual. In the future, she might be able to freeze anything as long as she wanted whether it was time, soul, energy, existence, etc but then, she heard that her husband had gotten the ability to counter her ice ability which made her curious.
Esdeath: "It is a vibration manipulation, right? Let me see whether I can freeze the vibration or not."
Haru didn't hide that he had received the power of "Gura Gura no Mi", but even so, it didn't mean, he could handle this power very well since he had just gotten this new ability recently, but even so, he was also curious whether Esdeath's ice manipulation was able to freeze a vibration, after all, vibrations were difficult (if not impossible) to freeze, as they caused the ice to shatter, and they were a perfect counter for an ice manipulation ability.
Haru thought for a while and agreed.
Haru: "Let's do it."
Esdeath: "Then use your app to get to the training ground."
"...."
Haru had to admit that Esdeath had learned to use her husband very well, knowing that her husband didn't have to pay to enter the Training Ground on the Group Chat.
After all, Esdeath knew that a point on the Group Chat was very precious so she didn't want to waste it and if she could enter the Training Ground for free, she would do so.
"Good."
Haru didn't say much and directly used his app on the Group Chat to transfer both of them to the Training Ground. He didn't feel afraid to leave his world directly since the time would stop when he entered the Training Ground.
Then Haru and Esdeath appeared at the same time, both of them looked at each other and smiled.
"Do you want me to set up the scenery?" Haru asked.
"No, let me," Esdeath said and turned the scenery of the Training Ground into a beautiful beach with a sea surrounding them. She then held Haru's hand and smiled brightly before changing her clothes into a bikini using the power of "Fuku Fuku no Mi" that she got before. She then also changed Haru's clothes into shorts and an aloha shirt.
"Your power is really convenient," Haru said with a sigh, thinking that if he had Esdeath's Fuku Fuku no Mi's power, then he could easily change his girls' clothes into any clothes in his imagination, whether it was a maid outfit, nurse, teacher, secretary, etc.
"You must be thinking something bad about my power," Esdeath said with a frown.
"Of course not, it is your imagination," Haru said with a serious expression.
"Well, enough of that, have you used the full power of the "Gura Gura no Mi"? Can you destroy this space with that ability?" Esdeath asked.
Esdeath knew the potential of "Gura Gura no Mi" was huge and with her husband's power, it was possible to destroy a planet or two with this power.
There were a lot of things that could be done with the power of vibration such as creating heat by using the power of vibration, but Haru's focus had always been destruction. The destruction that was caused by the power of vibration was very huge and if his power increased in the future, then it might be really possible for him to destroy the universe itself with this power.
"Well... let me check it." Haru nodded after looking at Esdeath's curious gaze.
In Esdeath's mind, when her husband became stronger, it was all good since if he became stronger then no one would be able to oppress them, no matter what they were.
"Stay back."
Esdeath nodded and walked behind Haru.
Haru then used the power of "Gura Gura no Mi" and around his fist, there was a boundless power that was ready to be released. He gritted his teeth and focused all of his power on his fist, releasing all the power without holding back.
Esdeath, who was behind Haru, could even see space seemed to be shaken because of Haru's power which made her smile brighter.
His fist turned red and blood kept dripping from it, then without hesitation, he released it in an instant.
*BOOOOOOOOOOOOOOOOOOOOOOOOOOOMMM!!!*