So, too, is Kewell's younger sister, Marika, who, after only being mentioned in novels and appearing for all of two seconds on screen as a pilot under Luciano's command before suddenly dying by Kallen's hand, is taken from Luciano and made Lelouch's subordinate, and given character development of her own.
Ascended Meme: Wholeheartedly embraces Jeremiah's Orange-kun nickname. His family even grows oranges.
And he even has a phobia of them stemming back to an unfortunate incident in his childhood (even dubbed 'citrusphobia' by doctors, according to Kewell), though he vehemently denies it. Fortunately for Jeremiah, this is merely the subject of friendly ribbing from his friends (notably Kewell), rather than psyche-breaking accusations of treachery.
Awesome, but Impractical: A Powered Armor project Darlton oversaw that was shelved for costing way too much and being way too complicated for practical use, with the final nail in its coffin being a showcase of the Knigtmare Frames' performance in Japan. He takes the project's fifth prototype to dole out some justice bearing the name Zero.
Awesome Moment of Crowning: Not actual crowning, obviously, but the scene where Lelouch is honoured by Emperor Charles before the Britannian court qualifies in every other way, as does the Roman-style triumph beforehand.
Brother-Sister Incest: At least one reviewer's eyebrows were raised by Lelouch and Cornelia sharing a bed... but it seems to be entirely innocent.
Nonette teasingly suggests that Cornelia give Lelouch "hands-on" lessons on the facts of life in chapter 17; Cornelia nearly has an aneurism just thinking about it. Definitely innocent.
Bulletproof Human Shield: Averted. Zero explicitly tells Lieutenant Kirkham that when attempting to invoke this trope, you should pick a fat guy (More mass to slow the bullets).
Cement Shoes: How Darlton planned to dispose of Lieutenant Kirkham, as a form of poetic justice due to how he had children stuffed into a container and ordered the container disposed into the sea. Ultimately though, it is Lelouch who sends Kirkham to his watery grave.
"When these Challenger III Longbows debuted, they were the fastest, most powerful fighting vehicles on the planet, combining artillery and main battle tank into one platform, with a 140mm rail gun firing 15 rounds per minute up to 100 kilometers. They only built a handful before we invaded Area Eleven, and after thatů well, no one was really interested in tanks after that. Production stopped and the finished pieces were placed into storage."
Exact Words: Schneizel's description of "C" is perfectly accurate in every detail. He just fails to mention it's a person, not a disease. Bonus points for his use of the word "contracts".
False Flag Operation: Played with: Lelouch has Jeremiah steal supplies from his jealous superiors using captured Panzer Hummels, who are then "driven off" by Black Knights reinforcements.
Fictional Document: Every chapter opens with an excerpt from one or more of these, ranging from personal memoirs, to news stories, to history texts, to theatre, to naughty romance novels (see Crowning Moment of Funny).
Foregone Conclusion: To a point. Many of the Fictional Documents are from decades in the future, and show that Lelouch (as the Black Prince) is both considered historically relevant and a inspiration for fiction. They also suggest that a lot of the things that went on "behind the scenes" in the present have become public knowledge. (For example, the trashy romance novel actually implies that in the future, everyone knows about Kallen's terrorist/rebellion activities). On the other hand, they give the implication that Lelouch is not alive when those documents were written, with the earliest future document being from 2026. It is of course possible that we are only supposed to think that.
For Want of a Nail: The entire premise of the fic. Chapter 27 seems to hint that the divergence occurs at least slightly before Lelouch's Calling the Old Man Out moment, since Lelouch has a dream-flashback to just before he discovered his mother's body where Charles uses his Geass on him, which didn't happen in the canon; though what the effects of this were exactly has yet to be established.
Freudian Excuse: Chapter 23 implied Nina's racism stems from her getting raped.
Genre Shift: When the story moves to Japan, there are a lot more romantic and comedic elements compared to the more military-focused plot of the earlier chapters. This mirrors the rapid shifts of the original series; the Battle of Narita being one of the biggest examples.
Knight Templar Big Sister: When Lelouch's is presumed missing or dead after his transportation is shot down, Cornelia launches a sudden attack that has diplomatic reprecussions. She is then seen torturing a prisoner to get information on Lelouch's possible whereabouts...when it's clear the prisoner knows nothing. The whole time she's in a Tranquil Fury.
It's also later explicitly said in her internal monologue that she would've gone as far as all-out invading the EU if Lelouch hadn't turned up when he did (which is what happens anyway thanks to the diplomatic repercussions mentioned above, but the implication is she'd have gone about it a lot faster and with a lot more fury).
Lelouch's Awesome Moment of Not-Quite-Crowning (see above) is very reminiscent of Suzaku's knighting ceremony in the original series, particularly when one person known to be close to the recipient of the honours (Lloyd in the original, Cornelia here) begins clapping alone in the crowd of hostile nobles, then another person less close to them and with wide general respect joins in (Darlton/Schneizel), which finally precipitates general applause.
In the original, Lelouch/Zero made a point of turning to stare directly into the camera carried by Diethard when he announced his name to be Zero. Darlton, this universe's Zero (so far, at least), does the exact same thing, albeit in very different circumstances.
Shirley: "I wonder what it'd be like if all the Emperor's wives and children lived together."
Lelouch: "They tried that once. Didn't work out."
Not What It Looks Like: Subvertedand theninverted - Lelouch lets his subordinates think that his lying naked on the floor of a bathroom with a soaking wet Kallen on top of him is exactly what it looks like, in order to protect her reputation.
Real Person Fic: In-story example - Lelouch finds some of this on the internet, pairing him with his subordinates or his half-siblings. The world should be thankful that he apparently hasn't found any Lelouch/Nunnally fics (which exist in real life).
Given that in the picture dramas from the anime its revealed that Nunnally actually did want to marry Lelouch when she was a child and that it apparently wasn't unheard of for royalty to marry within their own family in the Code Geass universe given that Euphemia at one point had a thing for Lelouch as well, and that Lelouch hinted it was at one point reciprocated'..... this probably wouldn't be as upsetting to him as we might think. Suzaku even comments on Lelouch having a sister complex when he sees Nunnally bound and gagged in a picture sent to Lelouch by Mao before Lelouch actually tells him what the real score is....
Reality Subtext: In Chapter 28, Lelouch says the last time he dined together with Schneizel, and Clovis was at Christmas. Schneizel's response? "That recent? It feels like more than a year ago." note "More than a year" is how long it took for Chapter 28 to come out.
Reasonable Authority Figure: Ironically, Clovis seems to come off as this for Area Eleven. The rest of the imperial family members related to Lelouch (and Lelouch himself) are also seen this way.
Certainly justified in the case of Clovis. His two big problems in the original, after all, were that he was overly cruel to the Elevens and not smart enough to match Zero. The latter is hardly saying much, given whatZero is, whilst the former was in fact due to Lelouch and Nunnally's 'deaths' when Japan fell to Britannia. Which, obviously, didn't happen in this continuity.
Rescue Romance: Nina seemingly falls for Lelouch after he saves her and Shirley from muggers, in a mirror of her rescue by Euphemia in canon.
Royals Who Actually Do Something: In spades. While there are plenty of nobles who fail to get much done, Lelouch and his closer family members in office are damned capable leaders. Even Clovis is shown to be able to do his job effectively (not that he won't turn to Lelouch for some help here and there).
Serious Business: In Chapter 27, Milly posts a notice describing in great detail the "pizza thief's" crimes, the penalties involved, and the fact she hired a private detective (or drafted Lelouch) into finding the culprit. Stealing pizza under Milly's watch is apparently Serious Business.
Ship Tease: There has been a lot of hinting around Lelouch/Milly and Lelouch/Kallen. Chapter 20, in which Milly kisses Lelouch, even closes with a joking "It's been a long journey: Thank you all for reading Lelouch of Britannia. Please look forward to my next work.".
Milly also quite unsubtly (if you're anyone but Lelouch, that is) implies that she'd quite like to marry him some day.
Shotacon: A Somali pirate leader's moll hits on Rolo.
Several 40-something women hit on Lelouch repeatedly.
Chapter 20 mentions the New Tokyo Philharmonic Orchestra, led by conductor Shinichi Chiaki
One of the guests at Clovis' party is San Francisco 49ers quarterback Shin Seijuro.
Kallen's ambushing Lelouch in the shower in chapter 24 harks back to a well-known scene in episode 3 of the first season, albeit with a Gender Flip.
The Zero battlesuit used in Chapter 26 has a number of features - radar in the helmet, slash harken grappling hooks, cape that stiffens to become a glider - evocative of a certain movie series featuring a Crazy-Preparedhero.
In the Black Knights' first action against the North African League, they are raiding a prison to rescue Britannian soldiers. Jeremiah yells at a soldier just freed, "On your feet, soldier; we are leaving!"
See if this sounds familiar: a pair of young military officers, involved in a campaign in a desert region, the one more comfortable with a desk job, the other determined to remain in frontline service. Despite the former's disposition, he ends up dying in a heroic sacrifice, showing outstanding valour; he is given a full military burial and posthumously promoted three ranks, ironically finally surpassing his friend, as was a long-standing ambition of his. Oh, and his death is one of the most emotional moments in the series. Kewell with Jeremiah, or Maes Hughes with Roy Mustang? Bonus points for being another Red Oni, Blue Oni pairing, although several of the traits are swapped around.
Sawasaki's return to Japan is evocative of General Douglas Mac Arthur's return to the Phillipines during WW 2.
Spot of Tea: In keeping with the general Britishness of the fic's tone.
Squee: Lelouch's celebrity status after North Africa is such that upon his triumphal parade in the capital, he induces a mass Squee among the women of Pendragon.
"That day, the young women of Pendragon died many happy deaths."
Tsundere: Kallen, even more so than in canon, since she's caught between hatred of smug Brittanian royalty, grudging respect for him, and the uncomfortable fact that he's really, really hot.
Vigilante Execution by a Vigilante Man: Darlton became Zero in order to punish Lieutenant Kirkham who was not found guilty of killing Japanese children as part of a coverup of his slave trade activities. While Darlton did kill the platoon that served with the noble in a Curb-Stomp Battle, it is Lelouch that has the villain sleeping with the fishes.
What If?: This is the fic's basic premise, of simply what if Lelouch remained a royal.
Wild Teen Party: Jeremiah reminisces about one of these after Kewell dies, even noting that it was "just like the movies".
You Are Not Alone: As an indication of how different the timeline is compared to canon, Cornelia and Euphemia are there to comfort Lelouch after Marianne's funeral. As time passes, we also see that Schneizel, Clovis and Cornelia's generals (who may as well be family) are solidly with Lelouch and actively help him whenever they can.