For characters originating from either Mass Effect or My Little Pony: Friendship is Magic, refer to the character pages associated with those franchises for in-depth analyses. For simplicity's sake, please only provide examples of tropes for these characters that apply primarily to the Equestrian Equation series on this page.
War hero. The first human SPECTRE. Hero of the Citadel. Brought back from the dead to defeat the Collectors. Turned into a pony. Shepard is the hero and main character of The Equestrian Equation.
Badass: Even when turned into a pony, with no access to any of his weapons, or even fingers, he still holds off a literally endless swarm of Royal Guard security programs long enough for his companions to complete their objective.
The duly elected "Madam President" of the Equestrian Herd. She is the main character of Shades of Twilight. As the end result of Celestia's biotics breeding program, she is the most powerful and evolved Equestrian to ever have lived.
Adult Fear: All too aware that just one event, accidental or intentional, has the potential to wipe out what's left of her entire species.
Authority Equals Asskicking: She's the leader of the Herd thanks to her wide skill base, sociology training and general intelligence and charisma. It also helps that she is arguably the most powerful biotic in the galaxy.
The Chains of Commanding: Twilight really understands that being a leader means being faced with great responsibilities.
Good Is Not Soft: One of the challenges she faces early on as leader of the Herd is demonstrating that despite their cuddly appearance, low numbers, and friendly personalities, Equestrians are not weak, and won't be bullied.
Mama Bear: To the entire Herd. She wasn't bluffing with the krogan.
Mind over Matter: After being extracted from Equestria, her "magical" abilities have been reduced in scope to the range of effects made possible by biotics. The most obvious and practical of these is her use of telekinesis.
Playful Hacker: Having Administrator access while being aware that she's living in a virtual world, but being unable to share this fact with anypony and getting their immediate memories erased when she tries, Pinkie spends her time in Equestria having fun bending the rules of the simulation.
Director of Defense for the Equestrian Herd. She is also an "Apex Specimen" of the pegasus subspecies, and the most highly evolved pegasus among the survivors.
Arrogant Kung-Fu Guy: Has elements of this in "Shades of Twilight." Her arrogance and self-confidence in her own abilities prevents her from listening to Lt. Pyres when he criticizes her about her performance.
Teeth-Clenched Teamwork: Her relationship with Lt. Pyres is this at best. At worst, it's outright nonfunctional, even actively antagonistic.
Self-proclaimed "Director of Culture" for the Equestrian Herd.
Like a Fish Takes to Water: Proves herself to be the member of the Mane Six who needs to change the least in order to adapt to life outside of Equestria. In Arc 1 of Shades of Twilight, she's the one who points out that Equestrians' tendency to go naked is an issue with other species that needs to be addressed, adapts very quickly to the advanced technology of the Citadel, and shows considerable business savvy in the cross-species market.
Skewed Priorities: Twilight and everyone else thinks she has this going on when she's adamant that the Equestrians need to start wearing clothes as a species. Rarity finally spells out for them that other species are embarrassed or ashamed by their relative nudity, and it is in fact a very big deal in the minds of other races.
Director of Labor for the Equestrian Herd. She is also an "Apex Specimen" of the earth subspecies, and the most highly evolved earth pony among the survivors.
Boring, but Practical: Her plan for building up the starting capital needed to get New Ponyville running is simply to send out a workforce to get employment in the neighboring districts. The intent being that they would be able to build up the needed funds without putting the Herd into debt, albeit more slowly than if they took out a loan.
Oh Crap: Her face when Twilight and 42 spell out for her that punishments in the Citadel are a lot worse than in Equestria, and she's looking at something like 25-30 years in jail, at the least, for taking Dr. Hern from the hospital.
Wrong Genre Savvy: Figures that gumption and hard work are all that will be needed to get New Ponyville on its feet financially, without considering that a workforce of hooved quadrupeds who have considerable difficulty using tools designed for other species (not to mention the increased liability that comes from them being an endangered species) makes them less than viable to many employers.
Up to Eleven: At the beginning of the second arc, she abducts the comatose Dr. Hern from the hospital when she believes that she is in danger. Twilight and Forty-Two have to explain to her that, unlike in Equestria, it'll take more than a heartfelt apology and a friendship report to make up for the multiple felonies she's committed, even if it was with good intentions.
Director of Interspecies Relations for the Equestrian Herd.
Awesome by Analysis: Possesses enough knowledge of alien biology to detect a minor skin blemish on Lt. Pyres that would go unnoticed by most non-turian medical professionals.
The Bully: Surprisingly, Fluttershy was one when she was a filly, as she would abuse The Stare (actually an expression of her Administrator status within the Equestria simulation) to force others to do whatever she wanted. This ended when she was sent to Bedlam and mentally re-conditioned into a Lovable Coward instead.
Good Is Not Soft: Takes this lesson to heart after the "Krogan Incident", adopting a gentle but firm approach to negotiating with other species.
One of the three AIs responsible for overseeing the Equestria Facility. Her primary task was looking after the virtual world of Equestria, and ensuring the continued survival and perpetuation of the ponies as a species. Her real name is Solaria Epona, granddaughter of Lord President Solarius, the last leader of the Equines. Her mind, like those of her siblings, was uploaded into the system by Dr. Hour Glass.
Anti-Villain: Type III. Regardless of her methods, she never stopped caring about her little ponies, and everything that she did was in the name of keeping them safe. When Shepard makes her realize that the Reapers will inevitably discover Equestria regardless of her best efforts, she ceases to be antagonistic and makes peace with her faithful student before her systems shut down.
Broken Pedestal: When Twilight discovers that the mentor she idolized was far from the paragon of virtue she believed her to be.
Rebuilt Pedestal: She and Twilight make peace before saying their final goodbyes.
One of the three AIs responsible for overseeing the Equestria Facility. Luna's main task was to look after and maintain the physical facility, as well as monitoring the outside galaxy to see if conditions were right for the ponies to be awakened, and preparing the ponies to return to the galactic community when that day arrived. Her real name is Astrolia Epona, granddaughter of Lord President Solarius, the last leader of the Equines. Her mind, like those of her siblings, was uploaded into the system by Dr. Hour Glass.
Aliens Steal Cable: As part of her task of monitoring civilizations throughout the galaxy.
Big Good: She is the one who brings Shepard into Equestria, after having watched him for a long time, and concluded that he might finally be the one who can defeat the Reapers once and for all.
Stealth Mentor: She reveals herself to be this to Twilight in her final message to her, saying that she manipulated many events in her life in order to groom her to serve as the Equestrian Herd's leader when it came time for them to awaken.
One of the three AIs responsible for overseeing the Equestria Facility. Discord's duty was to create fresh imaginings of the virtual world to prevent cultural stagnation, as well as creating new characters and artificial conflicts for the ponies to engage with. His real name is Cosmos Epona, grandson of Lord President Solarius, the last leader of the Equines. His mind, like those of his siblings, was uploaded into the system by Dr. Hour Glass.
Dirty Coward: His main motivation is to save himself from the imminent failure of the Equestria simulation when the Harmony Core goes dead and is more than willing to doom all the ponies to do it.
Dissonant Serenity: After his plan to free himself from the Equestria servers by getting Dr. Milligan to upload his program out fails, Discord actually gets so furious that he overloads some of his emotional subroutines. After that, he sits back and calmly enjoys watching Equestria burn courtesy of his simulated Reapers.
Necessarily Evil: His intended role in the Equestria simulation was to create antagonists and obstacles for the inhabitants to overcome so that they wouldn't grow overly complacent and lethargic. It's revealed that, at one point, Celestia took him offline in an attempt to create a true utopia, not realizing that without the essential services Discord provided, the ponies would grow so bored as to have their minds deteriorate.
Cadance is the AI in charge of overseeing and maintaining Lunar Security Station One, in orbit around the planet housing the Equestria Facility. She also has responsibilities to render assistance to guests as a greeter and a caretaker, provided the guests do not present as hostile. Her real name is Pitch Perfect. She was the ESC's Public Liaison Director before the Daemons attacked, and her mind, like those of the Epona Siblings, was uploaded into the station's systems.
Break the Haughty: Her best (and only) friend turns out to have been just a program and so is erased with Equestria. She's lost the cutie mark that was her reason for considering herself superior in the confines of the program, and in the real world her mother's former wealth, and thus her own status, are totally gone.
Heel-Face Turn: Around the end of The Equestrian Equation and beginning of Shades of Twilight.
The Smart Guy: The most thoughtful and mature of the "New Equestrian Crusaders". She also has quite a bit more of her mother's talent for finance and economics than one would expect from a filly her age.
Cassandra Truth: In Equestria, she was subconsciously aware of data gathered on the many species of the Mass Effect universe, but she had no awareness of the simulation itself, causing her to be treated as a Cloud Cuckoo Lander for being obsessed with "imaginary" alien races.
Badass Bluff: Helps Twilight give one to Dr. Hern's husband from recovering her for Cerberus and to keep Applejack from going to prison.
Guile Hero: She's in the lower tier of biotic potential for an Equestrian, so she relies more on her recent legal training to help the Herd.
The Only One: As the first (and currently only) Equestrian to have passed the Citadel Litigation Association's Bar exam, she's pretty much the District Attorney by default, and the only one who can represent the Herd as a litigator.
Doctor Horace Milligan
Chief scientist of the Cerberus team investigating the origin point of the Harmony Cannon. Like Shepard, he and one of his subordinates were trapped within the Equestria simulation. When Shepard first meets him, he is an inmate in Bedlam while the programs there try to force him to believe that he is a pony.
Brainwashed and Crazy: It's subtle, in the same vein as Reaper Indoctrination, but his plan to upload all the information in the Equestria Servers to The Illusive Man comes from mental suggestions that Discord implanted in him during his stay in Bedlam.
Oh Crap: Milligan literally says this (albeit more colorfully) when he realizes that Twilight Sparkle is a biotic, and the bullets he fired at her are stopped by her kinetic barrier.
Villainous Breakdown: When Shepard confronts him in the Harmony Core chamber over how Discord has been manipulating him the whole time, he becomes increasingly irate and incoherent to the point where he's shouting like a crazy person. See: Brainwashed and Crazy.
Doctor Patricia Hern
One of the members of Milligan's science team, also brought in to the Equestria System alongside her superior. She is found dazed and confused by Applejack, who takes her in and gives her the name of Patch on account of her coat colors.
Mind Rape: When she and the other ponies are captured by Celestia, the Princess uses her power over the system to wipe out Patricia's human memories and persona (which is incredibly painful to her), resulting in her forgetting who she really is and thinking she's always been a pony.
42 of 50
A helpful Changeling Drone who makes appearances throughout The Equestrian Equation. By the end of that story, Twilight makes 42 her personal assistant because he reveals himself to be a sentient AI whose code is very similar to that of her "number one assistant" Spike. Pretends to be an emotionless VI in public, but in private displays a familiar sense of humor.
Laser-Guided Karma: Delivers some to Councilor Sparatus. After the Councilor votes against granting the Herd "endangered species" protections, 42 accesses C-Sec's databases to get Sparatus's car impounded. This has the added benefit of pulling Sparatus out of the meeting when it comes time to decide on granting the Equestrians a district in which to settle.
Mother of Silver Spoon. In the Equestria simulation, she was Ponyville's wealthiest banker. In the real world, she serves as Treasurer for the Equestrian Herd and as the Madam President's financial adviser.
Sour Supporter: Somewhat more surly and aloof than the rest of Twilight's inner circle, but whatever course of action the Madam President decides on, she'll crunch the numbers and work tirelessly for the best possible outcome.
A volus entrepreneur who was the highest bidder for control of District 1286 before the Council designated it a protected reservation for the Equestrian Herd. Despite having received a full refund, he still asserts that District 1286, now "New Ponyville", rightfully belongs to him.
Corrupt Corporate Executive: Jex's firm, Expanding Reaches, has a reputation for intimidation and unsavory business practices, and Jex himself is portrayed as a nasty, selfish person who would go to any length to get what he wants.
Evilis Petty: Mr. Kailer put down a great deal of credits for control of District 1286 while the bidding was going on. The Herd showed up and was granted the district, Kailer gets a full refund. He treats this a unbearable affront and has put the Herd under constant legal pressure instead of moving on to other ventures. He has also sent people to place surveillance equipment in the District, and has now timed an inflammatory documentary to come right after the Hern Scandal.
Malicious Slander: Expanding Reaches has a large share in Hard-Press Media, which produces xenophobic conspiracy theories under the guise of "documentaries", including the Equestrian-bashing The Cost of Grazing.
Lt. Taxar Pyres
A turian C-Sec officer assigned to be New Ponyville's liaison with Citadel Security. A ten-year veteran on the force, he has a record of abrasiveness and disrespect for authority, but also for going above and beyond the call of duty when it comes to bringing criminals to justice and protecting the innocent.
Compassionate Critic: How he sees himself in Arc 2, Part 1; he has nothing against Rainbow Dash on a personal level, and indeed he thinks she has a lot of potential as a law enforcer and security guard. However, he also thinks she's brash, arrogant, headstrong, temperamental and otherwise full of herself and so, like any good turian, he refuses to let that go unchallenged.
Cowboy Cop: As noted, he's notorious for his disrespect for authority and willingness to break the letter of the law in pursuit of enforcing what he considers its spirit. Ironically, he seems to be shaping up to be the Reasonable Authority Figure in New Ponyville.
Defrosting Ice King: Starts to warm up to Twilight when she demonstrates that the Equestrians aren't just colorful balls of fluff for him to babysit.
Guile Hero: The way he deals with the scandal surrounding Applejack's well-intentioned but illegal actions, he maneuvers Dr. Hern's husband into dropping the charges while at the same time ensuring that Dr. Hern will remain on the Citadel where she can be treated without the risk of exacerbating her condition that would come with interstellar travel.
Jerk with a Heart of Gold: According to his records, despite his abrasiveness and disrespect for authority if it gets in the way of results (an unusual, but not unheard of trait among turians), he is truly dedicated to his job and the protection of the innocent, often going above and beyond the call of duty to do so.
He complains when the Cakes send him a basket of their baked goods, which are inedible and poisonous to him, but he still kept the basket instead of throwing it away.
Kicked Upstairs: Averted in his records, as he turned down a number of promotion opportunities so that he could continue to fight street-level crime.
Reasonable Authority Figure: He seems to be shaping up this way. Once Twilight tries communicating with him and makes it clear that he isn't going to be some sort of glorified babysitter, he's a lot more approachable.
Dr. Hour Glass
An Equine scientist and technical genius who was a chosen to head the Equestria Project back when it was little more than a luxury resort. Not long after, the Reapers came to the galaxy, forcing him to give the facility a new, more urgent purpose: to ensure to survival of the Equine race in case the worst happened.
Expy: In-universe, the "Time Turner" character program was created as a tribute to Dr. Hour Glass.
Heroic Sacrifice: Which prevented the Reapers from discovering the Equestria facility.
Posthumous Character: Hour Glass had been dead for millions of years before the events in Equestrian Equation.