WARNING: Spoilers Off applies to this page. Proceed at your own risk.
As Kill Six Billion Demons takes place in a Crapsack World, there is bound to be a lot of sombering moments.
- Pretty much the entire state of the multiverse. This is a universe where even the lowliest of beggars can earn Enlightenment Superpowers and claim one of the keys of God, the power of creation itself. And for millenia it has been stagnating in war and suffering because anyone who has so far managed to claim one of said keys has been cruel and tyrannical.
- In Wielder of Names, Mottom's visage as an evil overlord utterly cracks as she desperately pleads with Allison to help her
, feeling completely trapped in her role as a monstrous tyrant. It's genuinely horrible to see Mottom's despair and how she's turning to Allison as her last hope.Mottom: It's getting worse! My court grows hungrier by the day, and the other six scheme my downfall with my every breath! Everything's rotting! I'm rotting! The fruit is working less and less and it's the only thing keeping me alive! Do you truly know how old I am? The days are like water. - Alison manages a frantic, desperate escape, slipping through Mottom's fingers by teleporting away at the last second. Book 2 ends with of the once mighty demiurge, her body visibly aging, all alone at the edge of her grand city, shedding bitter tears at the realization her day's are numbered and the source of her immortality is gone. For all the cruelties she visited upon countless others, Mottom herself is ultimately a pitiable wrech. Like the other demiurges she too is trapped in a prison of her own making, and too wrapped up in her own fear to escape it. Despite everything, even Allison cannot help but to somewhat pity her."She is just a scared old woman."
- White Chain being banished for becoming too much like a human. Not only are they reduced to sobbing and pleading for the first (and so far only) time in the comic, but even the angels who carry out the punishment seem upset and remorseful about it; none of them look happy to see White Chain punished and one straight-up asks White Chain for their forgiveness.
- That said, the (nominally) good nature of angels probably compels them to express remorse about administering punishment to their own kind, if only as a matter of protocol. They don't seem reluctant to banish White Chain in particular, and White Chain, in turn, spitefully rejects their impassive expression of fraternal familiarity, stating "I am not your brother." Not that this makes the scene any less sad. In fact, it reinforces White Chain's outsider status among the angels.
- In book three Allison finally confronts the Grand Dragon, Mammon! Only to find that he's a senile, broken down mess that does nothing but count the money in his vault. It seems that while Mammon's body is immortal, his mind is not and has succumbed to dementia. He doesn't remember how or why he got his wealth in the first place, which is especially awful given how much destruction and suffering he caused getting it. He can't even make himself care about the money anymore; he actually doesn't mind if Allison takes whatever she wants from the vault, as long as she lets him finish counting it first. To see such a powerful, majestic being brought down to such pathetic levels is simultaneously karmic and tragic. There is an entire religion founded on this reaction.
- Upon taking notice of Allison's weapon, Mammon offers his neck to her with disturbing nonchalance, showing that for all his mind has been lost to the fog of ages, a part of him still feels terrible regret over his actions, and all he sacrificed for his now infinite yet worthless wealth.Mammon: Oh! Ah. Hmmm. You thought to slay me?
[He lays down and offers his throat, with dozens of blades already lodged in it.]
Mammon: Well, go on then, give it your best. I'm just too damn big for that sort of thing now. Many have tried, certainly. They've mostly decided to stick around, for some reason. It's a hard journey in here, I suppose. And they do help out around the place.
Mammon: Go on. I deserve it, I know. My brothers... - During King of Swords, 82 White Chain finally gets to see 6 Juggernaut Star's true appearance, revealing a deeply sad and fundamentally broken being under all that hatred. Stuck in an endless time loop with perfect Ripple-Effect-Proof Memory, unable to escape or know under what conditions it will all end and unable to express her own view of herself to the point that that she intentionally uses 'it' as a pronoun, there is something fundamentally sad in the whole character despite how destructive it is otherwise.
- After barely surviving the world-scouring BLOOD-SATED SWORD SOUL, Allison just...breaks. Even as Incubus remains defiant in the face of Jagganoth's overwhelming strength, Allison shuts down completely, the terrifying reality of how over her head she is crashing into her mind with the force of a meteor. The poor girl can only try to hold her mutilated flesh together and whimper for it all to stop. It gets worse moments later.
- Solomon David mantles his core and throws EVERYTHING he has into stopping Jagganoth with his Dangerous Forbidden Technique. The force of the impact shatters reality itself, and the once almighty ruler has a brief vision in the darkness. His beloved wife, surrounded by his daughters, calling him "Pathetic". Even at the height of his majesty and power, the guilt he felt for their loss, and the fear of their judgement never ceased being the very core of the demiurge's heart. The vision creates such a surge of emotion within that it makes him throw away whatever vestiges of composure he has left and punch Jagganoth in the face with enough force to create a Kugelblitz. His fate, as of now, is unknown.
- Cio performs a last ditch backstab on Incubus to give Allison time to escape, only for the former to slice her apart with contemptuous ease and then move in to kill the later, only Maya's timely intervention and an unexpected help from Jadis saves her life.
- A tearful Jadis offers a request to the dead gods for Allison after the later finally snaps out of her doldrum and leaves her domain. As a being with perfect knowledge of the future, she cannot believe in the defiance of destiny, and still, she cannot but ask of the long-dead deities for some manner of comfort for someone who was in her care for so long.Jadis: O, ye corpse gods. I, whom am now complete in my perfect and self-circular failure, beseech thee. Pray for her. I, who once desired to heal. I will thee, I who lack will itself. I, who lack I itself. I beg thee, pray.For her.The God Of Suffering.For the Wheel Smashing Lord.
- When Mathangi Mantra at the height of her power came to see her old mentor to thank her and calm her doubts, Meti answers by asking why she didn't become a noodle seller like she advised her to, where her mother who loved her so much is, and why her children have become ashes of her conquest.
- After Maya fled from Meti's revelation, she abandoned her position as a Demiurge and settled on a small world, starting a family. Based on her former master's lesson, her time on Daitu may have been one of the few instances in her life where, despite her massive step down in prominence and authority, she was truly happy. Incubus ensures it does not last.Maya: Little Ava, who smiled too much. Priya, who was a crybaby and hated straying from her mother. I had a little farm with my husband. We grew vegetables. Mmm...
- Cio's return. She doesn't remember anything yet, and Allison, not wanting to see her get hurt again, is forced to scare her away by lying that she's her worst enemy and threatening to kill her should they meet again. You can tell from her immediate reaction that she really didn't want to, but she had no other choice if she wanted to protect her.
- Solomon David's state as of Wheel Smashing Lord. Once a member of the Seven and god-king of the Celestial Empire, the Demiurge now spends his days as a disheveled vagrant hiding out on one of the fringe worlds of his domain. Solomon has lost not just his Key (which he at least gave away willingly), but his ability to use Ki Rata due to overtaxing his body in sealing Jagganoth. The only comfort given to the ex-tyrant is a measure of wisdom, heavy as its price is, and possibly a step towards the Royalty he desired.Solomon: When you live your life like a pillar...When it topples, there is nothing left......But rubble.
