Heroic Willpower: At several points, but the most prominent example is after she's been knocked out of the sky by Tirac and suffered several maor injuries in a crash landing. She still picks herself up off the ground to try to stop him.
Hypercompetent Sidekick: To Megan. More obvious here than in her original appearance, since without the obstacle of studio executives stopping it from happening, readers of Chronicles actually get to see her handle herself in a full-on fight.
Must Make Amends: See My God, What Have I Done? below. She feels so bad for getting Megan, a child, involved in her troubles that she spends the rest of the story protecting and supporting her at every turn and at every possible cost.
My God, What Have I Done?: She experiences this when it settles in just how young Megan is, and that she's involved in the quest to stop Tirac because of her involvement in setting up the meeting with Lord Bernard.
Red Oni, Blue Oni: It'd almost be futile to even bother listing someone she isn't the Red to.
Tempting Fate: Her original line, Danger is my life! carries over into this fan fic.
Beware the Nice Ones: Most than a few of the villans learn this the hard way, and ended up bouncing off of whatever obstacle is in the way of their airborne descend.
The Chick: Since Applejack is closer to her FIM incarnation in this fic, this role has been given to Twilight, instead, who tends to be the least physical in fights and has the least combat focused magic of the group.
The Worf Effect: Completely averted. Weird Raptor makes great use of her ability to control the wind. In My Little Pony And Friends, Gusty would likely have been the first to go down in most of the situations the ponies find themselves in throughout Chronicles. Not here, though.
Earn Your Happy Ending: Like no one else's business! What the original Megan goes through over the course of the entire 80s cartoon is about the same as what happens to Chronicles's Megan in just one story arc!
Kid Hero: Laid unusually realistically. Instead of happily going along on the quest and then returning home triumphantly, she's instead subjected to all kinds of horrors that leave the poor girl thoroughly traumatized.
Refusal of the Call: Megan, in contrast to the original where she Jumped at the Call almost immediately. It takes her a lot longer to change her mind and decide to accept the task of killing Tirac.
What finally convinces her is listening to a recording of the last king of Umbrae, an ancient civilization, describing the events of The Cataclysm. She realizes that if Tirac isn't stopped, history might repeat itself, and that scares her even more than accepting the call.
Shell-Shocked Veteran: By the end of the Book 1, after she's been traumatized severely by Tirac and watched her lord, Frederick get murdered right in front of her. She's been on the slow path of decovery ever since.
Tagalong Kid: Played straight and then subverted. At first, all she did was assist her employer, the noble Frederick. Once it was revealed she could use an Ancestral Weapon to fight Tirac, she became the only prayer the quest had.
Team Mom: Maybe it's just because she's the only one around most of the time who has thumbs...
Badass Normal: Definitely, but a much lesser degree than most of the other badass normals in the story. While he's able to fend for himself in a fight just fine, he is far from being a death machine like The Specialists.
Character Development: Starts out as a insecure, somewhat nerdy young man of nobility that gets tasked with leading an expedition to protect the ponies of The Center Lands. By the end of the story, he's become a much better tactician, fighter, and leader. He's also much more confident in himself and his inate abilities.
Damsel in Distress: Not a severe case, but half the time, especially in the first portion of the story, he'd have to get his hide saved by others and eventually ends up being held captive on two occasions.
The Determinator: He's younger and inexperienced when it comes to leading troops and in the ways of battle, but dang if he'd won't force his way through by sheer, stubborn resolve.
For Science!: Has some shades of this. He definitely turns to it a lot to find the answer he seeks. Considering he's the first person not in the know to figure out where Tirac derives his power, it definitely works for him.
Heroic Sacrifice: Despite knowing that Tirac would probably kill him, he still attacked him head on distract him long enough for Megan to retreat and counterstrike. Tirac breaks his neck!
Heroic Willpower: The reason she survives constantly being over-powered at every turn.
Jumped at the Call: Frederick deeply loves the people of Dongard and will do anything to protect them. He even takes on the responsibility of leading the expedition first to fend off attackers at Dream Castle, and later leads the quest to assassinate Tirac.
He also kills one of the heroes by crushing the poor bastard's throat in his hand!
Family-Unfriendly Violence: During the final battle, he opened up a can of whoopass on the heroes and left them nursing their wounds while he got onto his demon pulled chariot and ascended to bring in The Night That Never Ends. His actions include crushing bones and throats.
Played straight in that it gives more backstory to the circumstances of Tirac and explains his motives. Tirac's people were once one of two ruling powers in Eoland, but then it all came crashing down when they accidentally caused a three day cataclysm that sundered their authority. They tried to reestablished control later, but by then, other nations had risen up and wouldn't hear of it and thus drove them across the Northern sea up to some frozen wastelands where the entire population gradually died off from the harsh conditions. Tirac is The Last of His Kind and returned south, having rediscovered the power of his ancesters. Once there, he started waging a ruthless campaign to Take Over the World. His motives are one-half "collecting his inheritance" (control of all of Eoland), which he was raised to think he was entitled to, and one half Roaring Rampage of Revenge against the other peoples of Eoland for driving his people up north where they died out.
Subverted in that the story does not treat this sympathetically. Tirac is a bitter, hateful, cruel tyrant that regularly kicks puppies on levels the original probably dreamed of, but wasn't allowed to on TV.
Magnificent Bastard: Very much so. His method of starting his campaign was brilliant. First, he used his power to unite otherwise warring tribes of Viking-like orcs to steal into the Empire of Balacroff and take it over from the inside. Then he allowed the other nations to think that they could match him with military might, met them on the field of battle when they came to free Balacroff from his control, and then enacted a Curb-Stomp Battle by unleashing his Darkness and obliterated the competition. Two birds, one stone. He took two of the greates world powers in just two battles, and forever put fear of his name in the hearts of the peoples of Eoland. So many of them just folded and gave up authority of their lands over to him without a struggle. So the few that stand up to him get crushed without much backup.
Would Hurt a Child: Yes. Yes, he would. In fact, here he does. He temperarily puts Ember through a Painful Transformation just to test out the Transmorphing spell he's going to use on four adult ponies.
What he does to Megan when they finally meet is even worse.
Ascended Extra: In the original cartoon, he was just a one-shot villain who enchanted the furniture of Paradise Estate, bringing it to life in order to drive out the ponies and claim the abode for himself. Here, he's Tirac's former Dragon and current Dr. Claw-like puppet master working in the shadows.
Big Bad: Seems to have taken over this role in Tirac's absence.
Black Magic: A practitioner of the Arcane Arts, a forbidden form of magic.
Dragon with an Agenda: He's not really loyal to Tirac (and the latter is well-aware of that fact). He's just using him as a means to get funding for his research. Of course, he will complete every task given to him by his "emperor".
Darker and Edgier: Though one of the more (relatively) dangerous villains in the old cartoon, his original incarnation has nothing on his Chronicles self.
For Science!: His entire motive. He is described as having an unquenchable thirst for knowledge. He remains loyal to Tirac throughout the first arc because it allows him limitless research resources.
Foreshadowing: Right now, he's searching for some kind of mythical stone, but whether it's the Flutterponies' Sun Stone or something else hasn't yet been revealed. However, it is certainly building up to a later event.
From Nobody to Nightmare: It's revealed that he was once a lonely hermit living in the frozen northern wastes. Thanks to his partnership with Tirac, he certainly qualifies for the Nightmare part.