After conquering 11 Dungeons in less than one hour, Natsu didn't even have a second to rest before he was forced to start working.
This was because, Natsu only had a single Proxy Dungeon Master, with a total of 13 Dungeons under him.
As for taking Amaterasu's help, there was no way Natsu could do so when he was in such a hectic situation and had to manage so many Dungeons.
Especially, when a Personal Assistant could make arbitrary decisions without his consent. And who knows what she could've done by the time Rias notified him.
Therefore, Natsu took Amaterasu alongside him as he travelled to every single one of the Dungeons he conquered.
Once there, Natsu changed their name depending on where they were at, decided on whether he needed to add monsters, and changed the Personal Guard.
Due to this, Natsu ended up spending almost three hours for each Dungeon, and spent a total of almost two days without even a second of sleep.
In the end, however, it was only the Dungeon he obtained from Amaterasu that Natsu didn't have to work on.
Because not only did it have a lot of DP, there were enough monsters, and a proper Personal Guard who could manage even if he didn't do anything immediately.
As for the others, Natsu needed to race against time and do something about any of then we're conquered.
This was because, since the time he conquered then, Natsu hadn't made a decision regarding whether he'd continue with the same Personal Guard, or create a new one.
Thus, there wasn't any Personal Guard in any one of the 10 Dungeons, and therefore if he didn't move fast, there was a risk of the Dungeons being conquered.
All in all, even though it almost took him two days to finish everything properly, Natsu could without any fear leave the Dungeons and not worry about them.
As long as visited each of them once per day, and made sure to make up for the dead monsters, Natsu felt that he wouldn't have to worry too much about any of them being destroyed by adventurers.
And if any Dungeon Masters dared to launch a raid, and tried to conquer any of them, Natsu could directly teleport all of his monsters and Personal Guards.
Throughout his continuous Dungeon travels, Natsu found out that the Dungeons he obtained were around the world in different places, and the closest one to him, was the one that Amaterasu used to manage.
The now Great Hokkaido Dungeon.
As for the one which was had the highest XP in it, it was the now Great Seoul Dungeon.
Out of everything that Natsu did, naming the Dungeons was the easiest task, while creating a Personal Guard for each of them was the hardest task.
This was because many of Natsu's ideas were rejected by the DH System for being too OP.
This included, but was not limited to Orihime who could turn time back, Izumi Curtis and her alchemy, Lucy who can use psychic vectors, and so on.
After this, Natsu began thinking about using Goddesses and Superheroines.
But in the end, the Goddesses were so strong, that even if he only picked one ability of them, the DH System completely rejected them.
As for the Superheroines, they were either too OP or too useless, for Natsu to pick any of them.
Therefore Natsu had to rack his brain and repeatedly test until he finally had enough Personal Guards to fill all his newly conquered Dungeons.
In the end, however, Natsu was forced to create a Personal Guard from the scratch, without basing it on any characters or individual he knew.
And that was Storm.
Natsu first used the DH System to give her control over as much lightning as possible, and only after that did he begin to increase the other stats and stopped when it had reached the barrier of OP rejection.
Still, even though he granted the sexy woman he pictured the power to use lightning, there were many restrictions placed on her.
That is, if she wanted to show the true power of lightning, there needed to be a thunder cloud close to her, from which she can drown out the lightning.
Of course, she could use lightning even without there being a source nearby. But when she did so, the damage wouldn't show the true strength of a real lightning.
Sure she could defeat any same levelled individual one on one, and even restrict those who are higher than her in level, but, she would never be able to destroy thousands of individuals in a single strike unless there was a thunderstorm close by.
Luckily Natsu didn't think too much about this, because Personal Guards weren't created with the intention to fight against armies. They were made to protect the Dungeon Core.
Also, after Rias informed him about the possibility of creating a special terrain inside the Dungeon by paying for them in the future, Natsu wasn't the least bit worried anymore.
As for the other Personal Guards they were, Retsu Unohana (Grade : SSS), Tsunade (Grade : SSS), Irene Belserion (Grade : SSS), Esdeath (Grade : SSS), Android 18 (Grade : SSS), Ur (Grade : SSS), Storm (Grade : SSS), Juvia (Grade : SSS), Tier Harribel (Grade : SSS), Ophis (Grade : SSS).
In these Personal Guards, some could show their full strength, while the others like Irene and Ophis had limited powers.
Irene could only turn into her Dragon form and fight, while Ophis, on the other hand, could only give enchantments which boost the capabilities of others.
These included power, defence, speed, and so on.
As for Tsunade, Natsu chose her not just because of her immense physical strength, but because of her abilities which would be able to heal many individuals at the same time.
Along with this, Natsu even created a maid for the Great Las Vegas Dungeon. And that was Orihime.
After all, even though she couldn't be used as a Personal Guard, it would be quite a huge waste to not use her as a maid.
Especially with those huge breasts of her.
...
[Dungeon Name : Great Tokyo Dungeon
Maid : Grayfia
Dungeon Lvl : 1 (XP : 256/10,000)
DP : 741,643
Personal Guard : Erza Scarlet
Number of Dungeons Monsters : 279
DP Produced Per Day : 275]
Dungeon Master Natsu's Aggregate Dungeons' Stats -
[Number of Dungeons : 12
Dungeon Names : Great Las Vegas Dungeon (Lvl 1), Great Hokkaido Dungeon (Lvl 1), Great Seoul Dungeon (Lvl 1)....
Proxy Dungeon Masters : Amanda Fletcher
Maids : Orihime
Total DP : 301,789
Personal Guards : Yoruichi Shihōin (Grade : SSS), Nana Shimura (Grade : SSS), Retsu Unohana (Grade : SSS)…
Number of Dungeons Monsters : 1,562
DP Produced Per Day : 3,300]