Derailing Love Interests: Jin gets an odd form of this, absorbing a Mind Rape that flanderizes him down to his brother obsession - and then a whole subplot dedicated to snapping out of it. Though this happens after Ragna and Tsubaki are together, it's clear that his ties to the latter have been pretty much ripped out of his mind for good.
Determinator: Jin has strong shades of it. However, it and his utter refusal to allow others to help him, even when he's getting his ass handed to him by Hakumen, is a fairly disastrous combination.
Fangirl: Tsubaki's Six Heroes obsession is why she travels with Ragna in the first place
For Great Justice: Tsubaki, naturally. Providing her main reason for fighting against the Librarium
Master of Illusion: One of Phantom’s most debilitating attacks is an illusion that locks up the victim through sheer terror. An example: Ragna sees himself become the Black Beast and kill Tsubaki. Very few people have been able to escape it so far.
Oblivious to Love: Ragna either cannot or will not put two and two together about Rachel's behavior.
By chapter 22 of AFH, she knows full well that he leaves out important information and is thus largely unaffected by his words. Her lack of response is effectively Tsubaki ''trolling Hazama'', and he doesn't like it one bit.
Butt Monkey: Ragna all through the first three chapters, to the point of losing to Bang
Continuity Nod: Chapter 3, while Tao is recovering from having her leg mangled by Arakune:
Litchi: "I'm sure that someone will take care of it while you're gone. But in the meantime…I can have you study. I'll teach you everything I can."
Despair Event Horizon: Tsubaki nearly crosses this at the end of chapter 5 after failing to drag a half-dead Ragna out of the Librarium after losing to Hazama.
Early Installment Weirdness: The first two and a half chapters can be seen as such, due to their heavy focus on humor and the author not being fully comfortable with the characters yet.
Everyone Can See It: This is actually one of the recurring reader complaints - some reviewers note that characters are remarking on relationship developments that don't seem to have actually taken place at that point in the story.
Shut Up, Kirk!: Hazama really isn't impressed by Tsubaki's justice speech at all.
"The Reason You Suck" Speech: Tsubaki gives Bang a rather mild one about his methods of justice. In At Fate's Hands, it's shown she actually got through to him, too.
The Scrappy: In Universe, Platinum did not have many fans after she stole Bloodscythe when Ragna was dazed. Funny at the time, yes, but it costs DEAR when the chips are down.
Too Fast to Stop: Ragna when Platinum steals Bloodscythe. He crashes head long into a wall when attempting Gauntlet Hades.
Unresolved Sexual Tension: Once things get going, this happens an awful lot (however, it's Tsubaki so it's lighter than M-rated stuff.) It's done more or less expressly to tease the ship in a very effective manner.
Villains Never Lie: Hazama claims this. And tries to tempt Ragna and Tsubaki with the truth. He receives a boot to the head from Tsubaki for his trouble.
Wham Episode: In-universe, chapter 8. Not only does Ragna learn that his sister is the Imperator like in canon, Hazama also reveals to him and Tsubaki that Ragna could become another Black Beast to make Tsubaki break up with him
Wham Line: "Tsubaki? I've never heard that name in my life."
What If?: Some unexpected encounters can create so much
Word of God: Carl almost made it into chapters 7 and 8, but the idea was nixed as his presence felt too forced.
For that matter, lifelink or no how did Hazama get up from having a Power Nullifier sword stabbed through him into the ground?
Partially explained in a light revamp of the story: Relius played a role in it.
Worf Had the Flu: Ragna puts up some pretty poor fights, but losing his sword and later his arm played a huge part.
You Are Worth Hell: “If you want me to, I'll follow you wherever you go, help you with whatever you need to do, do everything I can to protect you...like you've protected me. Hell, I'd walk with you into the goddamn Boundary if you wanted me to. I mean it."
Brainwashed and Crazy: In addition to massive army of NOL soldiers, Litchi and Gesshoku have fallen victim to Phantom's Mind Eater spell. She tried to pull the same on Tsubaki, but failed.
Break The Game Breaker: Ragna is unable to fully use his shiny new Idea Engine throughout due to the strain it puts on Nu's trapped soul, and some wounds from Hakumen's sword handicap him further in the later stages.
Call Back: In chapter 2 of On Strange Wings, Tsubaki says she'll talk to her father about the Kaka clan's plight. Cut to chapter 11 of At Fate's Hands when she and Ragna finally meet with Gesshoku...
Calling Your Attacks: Bang. Jin advises him his attacks might be more effective if he didn't do this.
Cliffhanger Ending: Terumi possessing one of the heroes, but who? Chapter 1 of In Time's Eyes implies it's Noel.
Curb-Stomp Battle: Nu curbstomps seemingly everything in sight throughout. Chapter 19 changes the pattern as Ragna uses terrain to his advantage, and she pulls one off for the heroes one chapter later - against Unlimited Hazama, no less!
Despair Event Horizon: Ragna breaks down crying after he thinks Tsubaki is dead due to the events of Chapter 13.
Fate Worse than Death: Voivod; after washing up outside Torifune (read: the city he nuked), Izanami bumps into him and removes his ability to die. He is forced to spend the rest of eternity looking at his own hubris.
Five-Man Band: Forming a little differently from canon and intentionally or not heavier on the girl power:
Forgotten Phlebotinum: Justified - Ragna is just that poor at planning ahead - but ultimately defied when Tsubaki makes use of Ragna's concealment Ars Magus to infiltrate the war zone.
Handicapped Badass: Tsubaki's eyesight is getting worse the more she uses Izayoi; she's been told to dispose of it for this reason.
Hazama, after Tsubaki removes his right arm in chapter 28.
Heroic BSOD: Averted. One would expect that Bang wouldn't take Litchi being in NOL very well... instead, he tried asking without breaking down and starts to understand her plight while keeping his spirit of justice. Even if Tenshin somehow doesn't approve (at first).
Indy Ploy: Oh, Makoto. Her inability to remember who can do what derails her actual plans, so she's constantly forced to make things up as she goes along. So far she's bluffed Terumi into a stalemate and exposed the NOL's plans on national television while referring to herself as Secret AgentStripper Squirrel.
Irony: Ragna finally displays some tactical sense (maybe he learned from Tsubaki after all), just in time to have Taokaka as his teammate. Then he overcomes that, only for a Hazama ambush and Nu's soul to send it all careening to hell.
Ragna noting that Hakumen's eternal pursuit of him is just like Jin's
Kick the Dog: Brainwashed!Gesshoku's plan for Tsubaki: "Captain Hazama's plan is to subjugate you to Phantom's will. You will be the one to end Ragna the Bloodedge's reign of terror; the last thing he sees will be the one he loves taking his life. And then, once that's done, Phantom will cast your soul to Hell for your treason." Somewhat crosses into Nightmare Fuel as well.
Kick the Son of a Bitch: Hazama straight-up revels in revealing exactly what Voivod had done, including telling him that the rebellion he nuked Ikaruga to stop never even existed. Note: This doesn't make Hazama look awesome for kicking an SOB, and in fact makes him even more depraved.
Killed Off for Real: Hakumen, after killing Take-Mikazuchi, has his soul ripped out by Izanami. He knew he going to die anyway.
Love Redeems: Played with. Tsubaki gets better, of course, and breaks the curse of Izayoi in the process while Noel seems to be at work on Jin and then there is Nu, but Hakumen's Knight Templar traits turn him into a deadly example of the Clingy Jealous Guy and Ragna briefly turns into a monstrosity out of heartbreak. It seems The Power of Love is quite potent but not automatically a good thing.
My God, What Have I Done?: It takes the destruction of Yabiko to make Litchi finally realize the mistake of accepting Hazama's offer. Unfortunately for her, at that point, she can't just quit unless she wants to get Brainwashed.
Tsubaki gets hit with this during the battle of Yabiko when she realizes all of the soldiers she had been killing were slaves to Phantom
Voivod gets a heavy dose of this after learning that he destroyed Torifune instead of Akitsu.
Retcon: At Fate's Hand started before CS Extend was released. However, as of canon, House Mutsuki is actually rebellious towards NOL, while in here, they're loyal and the only known member so far, Belioz, is thus far confirmed as a possible villain. The fic's sticking with the latter.
In chapter 24 of AFH, it was heavily implied that Bang’s Nox Nyctores, Phoenix: Rettenjou, was either his belt or his gauntlets. The very next chapter changed it to his nail to fit with canon.
What the Hell, Hero?: He's called out for losing Tsubaki, going insane against a defenseless Carl who's begging for life, and beginning to turn into the Black Beast due to anger. Given the source, it also qualifies as Irony.
Running Gag: A small one, but Taokaka multiplies the number of meat buns Ragna owes her by ten every time she thinks about them.
Someone, usually Platinum, cutting off Bang as he starts speaking. Because he'll never stop.
Sixth Ranger Traitor: Voivod, who did not want to be resurrected, ends up avenging himself by launching Sector Seven's nukes to destroy the organization's credibility.
Speaking of Bang, he activates Fu-Rin-Ka-Zan in the same battle; this troper thinks his ninja lackeys should've brought a sound system so they could play 'Beat A Nail With Your Hammer' when appropriate.
Azrael's Enchant Dragunov, and Noel's going to learn how to become Mu again.
"Don't you dare die on Luna, okay? Luna will never forgive you if you do."
Understatement: Rachel's reaction to hearing that Ragna and Tsubaki were ambushed by Phantom? "Somewhat problematic, I'd imagine."
Unspoken Plan Guarantee: In the first chapter, Makoto ends her section by asking Noel if she knows a concealment Ars. The next chapter reveals that no, Noel did not, and that was the lynchpin of Makoto’s entire plan.