It's been two years since Liu Mengmeng came to Demon Slayer world. During these two years, Liu Mengmeng did a lot of things.
After joining Demon Slayer Corp, she accompanied Mitsuri and completed Final Selection after six months of training. Later, she and Mitsuri learned Flame Breathing from Kyojuro Rengoku, the Flame Pillar.
When Mitsuri developed Love Breathing, she also said she had developed Shadow Breathing. If fact it was just use of shadows with the help of ghost type energy along with invisible psychic type attacks. Later, two of them became Love Pillar and Shadow Pillar respectively.
She also learned other Breathing from other Pillars after becoming Shadow Pillar. After learning, she created an improved version of Breathing suitable for spreading in douluo continent and completed one of her goals in Demon Slayer world.
Liu Mengmeng also discovered that she could absorb souls of dead peoples and dead demons and store them in ghost slate.
Most of the demon souls had very rich quantity of negative emotions. So she decided to collect demon souls to use them as a source of negative emotions to use ghost type moves which requires negative emotions.
She gave a moon shaped badge that contains ghost type energy to the Pillars. The function of these badge is to temporarily store the souls that just died. When Tanjiro and his group came to Demon Slayer Headquarters, she also gave him one.
The reason for making badges in the shape of moon because she found moon shape to be best for ghost type energy in this world.
As such she had collected some human souls, large number of demon souls, souls of 12 string demons and soul of demon king Muzan Kibutsuji.
Yes, after two years, the demon king is dead. When Liu Mengmeng had learned all the Breathings, she thought about killing the demon king, but the Arceus martial soul gave her a feeling that it was better not to do it, so she waited till now. Although it was an inexplicable feeling, she felt it was better to follow it.
Of didn't killing demon king, didn't mean that she do nothing. So she followed the original plot and saved all the Pillars who should have died, killed or maimed by string demons.
Before the final battle with demon king Muzan, she input large amount of psychic type energy in everyone's badges which can teleport them at the moment of fatal injuries, so no died in final battle.
Even Ubuyashiki family survived the explosion because they were teleported away. It can be said apart from Tamayo who herself had a death wish, everyone else survived.
Now, everyone in Demon Slayer is holding a party in celebration for extinction of demons. Liu Mengmeng was eating and also looking at the panel that changed after two years.
Name - Liu Mengmeng
Gender - Female(Futanari)
Age - 9 years
Martial Soul - Arceus, Space Ball
Level - 26
Title - Pope's Disciple (Indigo) , Genius Inventor (Yellow) , Shadow Pillar (Green)
Reputation Points - 26750
Backpack - Miscellaneous * N, Pokedex
Shadow Pillar - You are Shadow Pillar, one of the strongest of Demon Slayer Corp.
Because of being in different world, Liu Mengmeng can't cultivate soul power so her soul power level remained unchanged but her control over her own powers has reached a subtle level.
People in douluo world, pay more attention to power rather then control of power in early stage. But perhaps because of lack of strength, everyone in Demon Slayer Corp pays great attention to control of one's strength and bringing out one's own potential to the fullest.
As for the new title, Shadow Pillar, she got it shortly after becoming Shadow Pillar. Of course green grade is the limit of this title, even it can reach because most the people with luck in this world recognize this.
Every Pillar was enjoying himself/herself and Ubuyashiki family members were the most happy. They have completed the mission their family was carrying and also broke the curse.
Kagaya Ubuyashiki was also present in the party and his health has been restore after the final battle. Liu Mengmeng couldn't do anything about the curse but when curse broke up, it was easy for her to restore health.
Although everyone was busy celebrating, but they would still look at the white haired girl with respect from time to time. The white haired girl has always been the strongest and most mysterious among them.
If they had respect her for strength before that was still in human scope but after the final battle their view has changed.
Whether it is the moon badges that would flicker and take away people at critical moment or the ease with which she supressed and restricted the demon king or her healing methods shown during and after the final battle, it is out of human scope and reached God level in their view.