And I Must Scream - What Emerald ends up being subjected to when he was frozen in the Great Ice. Specifically, while almost everyone else experienced it as a sort of "bad dream" with varying degrees of consciousness, he was fully aware the entire time for over 300 years before he managed to free himself, (less than an hour before Serenity freed the rest of the world). Naturally he comes out of it rather shaken and leading to his Identity Amnesia. Beryls "Eternal Sleep" punishment is also along these lines, Emerald even directly compares it to being frozen in the Great Ice.
The Ageless - Emerald and the Sailor Senshi are this by Crystal Tokyo's time.
Cruel Mercy - How Emerald sees his planned punishment after being defeated in the first rebellion, mainly banishing him from the planet. More accurately, he's not so much angry at the punishment itself then the fact that everyone at his trial acted like this was being magnanimous of them.
If being thrown off the planet that had born, raised, and supported you, if being thrown off the planet that you fought time and time again to save and protect, if being thrown off the planet that people died, DIED to help you protect, if being thrown off your home planet, the planet you love is MERCY, then by the GODS, never, EVER show any mercy to me AGAIN!
There's no mercy in planetary exile, none at all.
Determinator - Emerald. He's been fighting against Crystal Tokyo just by himself and with his small sentient crystal for centuries, always dragging himself up to try again whenever he fails. This does take its toll however, and when he finds out that Serenity has Resurrective Immortality he decides to go for a Pyrrhic Victory by stopping the Purification whilst he was in the past.
Does This Remind You of Anything? - When Emerald is draining youma to regain his energy, he is only shown hunting female ones. While this can be attributed to the fact that most Youma in the series seem to be female, he corners them in ways that can be seen as reminiscent of assailants (he catches his first by breaking into her apartment as she comes home from work and gets another by luring her to an alley and tossing her down it, before going after and coming out saying how "easy" it was), which to be frank, is in fact what he is technically doing but not for the reasons normal people would think.
Dramatic Irony - The protagonist is unaware that Sailor Moon is Queen Serenity.
Enemy Mine - One of Emerald's off lines mentioned a brief alliance he had with the Sailor Senshi against an intergalactic conqueror who controlled his entire army through brainwashing. It lasted less than an hour and was described as ending in disaster. He also has a brief and unintentional one with Sailor Mars during one of their last battles when they work to save a child who gets caught in the middle. It leads to a brief moment when they both realise just how meaningless their battles have become. It's also implied that this event was what directly lead to Emeralds plan to travel to the past and prevent Crystal Tokyo from ever being born
Energy Absorption - Emerald needs to do this to get stronger, he can do so through a variety of ways and can even drain energy from the elements around him
Vampiric Draining - ...but in the end he does it most effectively by draining other living creatures, mostly youma to the point where they die and turn to dust.
Exact Words - Sailor Pluto sees Crystal Tokyo prevented from coming into being as it existed through no act of her own. Meaning by arranging events so Emerald be forced to go through with his fallback anti-Purification plan, and being in the right place so he could defeat her and feed off her energy, Pluto could prevent the future she didn't want without breaking her oath to Queen Serenity.
Fashion-Victim Villain - Emerald described the Senshi as "girls with interesting powers in silly suits. As opposed, of course, to women with horrifically intense powers... in silly suits." invoked
Gambit Roulette - At the end, it is revealed that Sailor Pluto was the true mastermind behind the plot to prevent Crystal Tokyo (or at least the "purified" version described) from coming into being. She spent "thousands of manipulations over thousands of years" working towards the goal "Only to realise only after [she] got it that it wasn't what [she] thought it was." After that she started secretly working towards getting Emerald to change things.
Getting Smilies Painted on Your Soul - The Purification is described as something like this, not so much forcefully making everyone happy so much as severing every "negative emotion" and leaving only "positive emotions." Emerald himself scoffs at this black and white view on emotions and he also sees his inability to prevent this from coming to pass as his greatest failure
Go Out with a Smile - Emerald ultimately dies this way, erased from casting his Anti-Purification due the paradox he created, content with finally achieving his goal.
Heroic BSOD- After Emerald finds out that Sailor Moon is the Serenity he has been looking for all along.
Identity Amnesia - Emerald cannot remember his own name or much of his past. His true name is revealed to be Yukio, by Pluto.
Jadeite, after being freed from his Eternal Sleep, remembers everything about his past before his brainwashing by Beryl, leading to a moment of sheer, screaming horror as these memories overwhelm him. Emerald thinks he's simply gone crazy and so snaps his neck.
The Immune - Emerald notes that his and Serenity's energies naturally repel each other. This effectively renders him immune to the Purification. He eventually casts an Anti-Purification when in the past after draining Pluto's energy that renders everyone on the planet this.
Instrumentality - What the "purification" supposedly did to the majority of mankind. The few that were strong enough to reject it or otherwise weren't affected are regarded as enemies by the Senshi, according to Emerald.
In the Name of the Moon - Emerald thinks it's over the top and at one point interrupts Sailor Moon during one such speech. It's noted by Pluto that this isn't the first time.
Meaningful Rename - The original group of rebels (who, in this fic, would come to inspire the Black Moon Clan) named themselves after gems and stones to reflect the fact that they were fighting for the Earth, Emerald was actually indifferent towards the idea since he saw little importance in names but did so anyway because everyone else urged him to.
Meaningless Meaningful Words - Emerald's journal entries are full of his fauxlosophical thoughts. At least some of it is written down deliberately to taunt the Sailor Senshi.
My Greatest Failure - Emeralds was his inability to prevent the Purification from coming to pass. This is due to him being immune to Serenity's power, had he released and bathed the planet in his energies first, he could have prevented the Purification from having any effect. Although, on an intellectual level, he notes that, at the time, he had neither the control, the knowledge, or the power to actually pull it off, the fact that he had the potential still caused him endless guilt. This eventually comes into play at the end when he does this whilst in the past.
Never Hurt an Innocent - Emerald was tempted to drain Naru of her energy after seeing how much she has but ultimately refuses due to this.
One-Hit Kill - Emerald does this to one of Kunzite's youma, with Kunzite himself standing there. And then to Kunzite himself later on, as well as many more Dark Kingdom fodder.
Power Crystal - Emerald's green crystal that he keeps around his neck by a leather chain, though he's quite powerful enough without it. It is also sentient.
Really 700 Years Old - Emerald is nearly a thousand years old, but appears to be no older than a young adult. Same with all the Crystal Tokyo Senshi, and the King and Queen.
Time Travel - From the 30th century, to the time the Senshi first reawakened in the late 20th century (Dark Kingdom Arc).
Unreliable Narrator - Almost everything we learn about Crystal Tokyo being a Bad Future is told to us by Emerald, who, it must be noted, has a very deep-set grudge against Neo-Queen Serenity. The fact that barely any of the fic actually takes place in Crystal Tokyo means we don't have much choice but to take his word for it, or reject it. Of course since part of this was implemented by Sailor Pluto, it really calls into question how right or wrong Emerald was.
Unrequited Love - Emerald and Rei in the future, due to them being Arch Enemies on opposing sides trying to kill each other. After journeying to the past, Emerald doesn't understand why he seems so willing at times to aid the younger Rei. May be possibly subverted at the end with the "present" versions of themselves.
"I killed it. A creature, youma, demon, call it what you will. Did it have dreams, aspirations, hopes? Did it wish for its life, to be hunted and killed? Did it want to be left alone?"
We Win Because You Didn't - Emeralds ultimate plan. He breaks through the timeline to attract Sailor Pluto's attention and drain her energy. Afterwards he casts his Anti-Purification spell whilst using Pluto's energy to prevent a paradox from occurring and effectively preventing the Crystal Tokyo he knew from existing.
Well-Intentioned Extremist: Despite Emerald's antipathy towards the Sailor Senshi, even if we take everything he says at face value at their worst they, at most, come across as this given that they did their best to save the world and try and provide a home for many people who lost theirs in the Great Freeze. Emerald himself is also arguably one of these, given that he's willing to travel through time to achieve his goals.