Lily revealed hers early on, and was thus titled a "Queen".
Alter revealed hers late in life.
Saber/King Arthur (King Of Knights)
Face Palm: Noted to be a frequent response to the other Sabers' antics.
Jack of All Stats: Compared to the other three, she's neither the fastest, strongest, toughest, most agile, nor the most powerful, however she's faster than Alter, stronger than Lily, more skilled than Nero, and has the highest magic resistance of the group.
Divergent Character Evolution: The original Saber Alter was just Saber who was corrupted by the Shadow in the Heaven's Feel route. Here, she's given her own distinct history where she went on the warpath on all of Europe.
The Empress: She had conquered all of Europe before her death. Unlike most examples, she was content to leave it there.
Tomboy and Girly Girl: She's the most tomboyish of the Sabers, especially when paired with Lily. Her title being "King" despite revealing her gender reflects this - unlike Canon Arturia, she is comfortable with aligning both her gender and her more brusque qualities. She's notThe Lad-ette, however.
Really 700 Years Old: She lived as an eternally youthful queen for many decades, outliving all of her friends and loved ones, before choosing to pass the crown and Avalon to Mordred so that she can age and die naturally.
Reasonable Authority Figure: For the most part, she is more understanding than Saber is towards Alter's darkened Excalibur. Doesn't mean she didn't want to hurt Alter for making the holy sword black, though.
Tomboy and Girly Girl: Compared to the other Sabers, she's the most feminine, however it really stands out when she's next to Alter.
Who Wants to Live Forever?: She says she grew tired of watching her loved ones die around her, which led to eventually bestowing Avalon to Mordred and aging away gracefully.
The Blacksmith: Her sword, Aestus Estus, was forged by Nero herself in a volcano from the purest ore of the empire, before summoning the greatest spellcasters of the Empire and the known world to enchant it and the high priests of the Olympian Gods to bless it. It's specified that Nero was a masterful smith, as even without the enchantments and blessings the sword was so good that Vulcan possessed his own priest to give Aestus Estus the blessing it deserved. When the blacksmith GOD thinks your sword is worthy of his blessing you know you are good..
Demoted to Extra: Sort of. Team Rin hasn't gotten much screentime in the story yet, so Archer kind of just exists in the background... for now. Since Rin has decided to participate more actively in the War, Archer may yet get some action.
Badass:He was a very brave soldier, and unlike most Roman generals fought on the front lines with his men (also unlike them, he lived the same lifestyle, avoiding any privileges afforded by his class), thus earning their respect. He was also, apparently, a very good swordsman, though he did not boast of that much.
Apparently when the first assassin stabbed at him he just grabbed the guy's arm asked him what the hell he was doing, and the assassin had to call for help. He also tried to stab back at them with only his stylus. After all the stabbings he didn't even go down till he saw Brutus. And the autopsy showed that only one wound was fatal.
Caesar got into the Senate unusually young specifically through being a badass: at the age of 21 he won the 'Civic Crown' - Rome's second highest military decoration, awarded to those who saved another citizen's life in battle and which was sufficiently high an honour to automatically grant him a seat.
Badass Boast:Veni, vidi, vici "I came, I saw, I conquered". His report to the Senate on the Pontus war and a post-humous Take That against Pompey, who got a bit tangled in the previous war there.
Compelling Voice: One of the great orators of his day, perhaps second only to Cicero.
A Threesome Is Hot: After summoning Caster Scathach, Bazett gets dragged into a threesome with her and Lancer. Bazett's internal dialogue the morning after indicates that she enjoyed the experience.
Cu Chulainn (Lancer)
Blood Knight: Just LOVES a good fight. In fact, that's all he ever wanted in this war. He got one from Samson.
Combat Pragmatist: Saw Shirou's Command Seals and decided eliminating him as soon as possible was the best course of action. Of course, the next thing that happened, ended up breaking the War.
Know When to Fold 'Em: Four Sabers each capable of keeping up with him caused him to retreat. Sure, he might love a good fight, but that was just insane.
The Berserker: Wasp Spasm allows him to nearly match Samson in strength and ability.
Abstract Apotheosis: Having overthrown the gods by hand in her legend, she is the concept of victory itself. This grants her divinity-equivalent powers without classing her as divine and giving her divine weaknesses.
Resigned to the Call: He didn't want to join the Holy Grail War, in spite of the Grail choosing him. However, he realizes he's the only one in his family who can handle the danger involved, despite being a pariah to them.
The Smart Guy: Knows that Napoleon is supposed to be taller, and figures out who Assassin is after only hearing her given name.
"This is a good death. I will not bend my knee. No hero will bend his knee to a threat." A chuckle. "A good run I suppose, short as it is. I, a hero with a legend barely two hundred years old, to one whose own spans four thousand years back. Perhaps it was hopeless in the beginning, but I matched your power until the very end, and in death, I will meet the standard. I will die standing."
More Dakka: His ranged weapon is all the artillery of the Grande Armée.
The Napoleon: Trope Namer, though not by choice; one of his Noble Phantasms revolves around his shorter-than-history height, and he is most certainly not amused.
Red Baron: The Emperor of France, the King of Artillery.
Status Buff: His Noble Phantasm Napoleonic Complex, which can be used when facing opponents who are at least ten inches taller than him. It boosts his Strength, Agility, Endurance, and Bravery up a rank. With his 5 foot 2 inches legend-enforced height, he can use it on every other Servant except for the Sabers and Jackie.
Values Dissonance: In-Universe. Napoleon declares Assassin unnecessary and suggests his Master command her to kill herself. From the perspective of the Grail War, it fuels the Grail and eliminates a competing Servant. From Jordan's perspective, it's commanding a young girl to kill herself.
Deadpan Snarker: Best summed up when she responds to Luvia's complaint about Herakles being Berserker.
"Oh boo-hoo, someone broke the rules. Get in line. Someone summoned four Sabers. Deal with it."
Parental Substitute: All of her Servants quickly fill the void Kiritsugu left for her and plot vengeance against the rest of Ilya's family when Herakles explains the circumstances surrounding his summoning.
Asskicking Equals Authority: Granted, he's loyal to Ilyasviel and listens to her commands, however, he's not above threatening or nearly killing Ilyasviel's two new servants when they try to fight each other against her orders.
The Berserker: Probably the Ur Example in Mythology, and is noted as a class in which he feels very comfortable in. He is absolutely deadly in upfront combat.
Nigh-Invulnerability: Thanks to both his flesh in general, but also to his Nemean Lion armour-pelt, which he can use in a pinch to summon the lion itself.
Spell My Name with an S: Has this issue pretty bad compared to the other servants. This is mainly because the author can't seem to decide if his name is Herakles/Heracles or Hercules.
Summon Magic: Cerberus with his amulet; and the Nemean Lion with his lionskin armour.
Stealth Expert: Can go invisible similar to an Assassin, thanks to his Noble Phantasm "Shroud of Minerva".
Summon Magic: His "The Odyssey" NP allows him to summon anything that he met in his journey, which... is a lot.
Javelin Thrower: His thrown lances hit as hard as missile strikes, and his Noble Phantasm allows him to turn anything resembling a spear into a low-level Noble Phantasm (like Knight of Honor, except only with spears). It is noted that he fights like an Archer despite being a Lancer.
Blade on a Stick: "Roaring Spear" is his strongest Noble Phantasm, the spear that was only blocked by Ajax's shield. Its power is comparable to an Anti-Army type Phantasm, which surprised Lancelot.
Improbable Weapon User: His Knight of Honor NP, which can make anything (from a twig to a telephone pole) into a Noble Phantasm-level weapon. Also, unlike in the canon, he can also 'break' them, turning them into makeshift explosives-which he throws as projectiles.
Lightning Bruiser: A-rank speed outside of Mad Enhancement, B-rank Strength capable of ripping telephone poles and street signs out from cement, not one of his stats is below a B-rank. When he turns on the gifts his class grants him, he pushes his abilities even higher. He's fast enough to actually counter the Nine Lives attack from Hercules, which is nine attacks done at supersonic speeds.
What the Hell, Hero?: Merlin gives Lancelot a tongue-lashing to this effect, snapping him out of Mad Enhancement.
Anti Anti Christ: This Merlin is based on the interpretation that he's the son of Satan, not just an incubus.
Badass Grandpa: Doing what he did to stop Lancelot's berserk assault. He showed exactly why he's the quintessential wizard in three moves flat.
Born Lucky: Quite literally, being the spawn of Satan himself. However since luck is just luck, he can't rely on it all the time to save his ass, so he always have a back-up plan just in case things go shit.
Absurdly Sharp Blade: Gram actually can cut into Hercules. It IS the blade that Caliburn(which in canon can kill Hercules SEVEN TIMES with a SINGLE HIT) is based off of, after all.
Badass: He can fight Hercules on even terms, folks and is one of only two Servants who can do that.
The Berserker: He actually has his own form of Mad Enhancement as a Noble Phantasm(can boost his stats up by a rank), which he uses to fight against Herakles evenly, though he admits that Herakles is still stronger than he is, though not by much.
Blood Knight: When he was injured by Hercules, he suddenly grinned and went all out, ignoring all pain and damage done to him during that time.
Nigh Invulnerable: Per his legend, having bathed in the blood of a dragon in order to gain impenetrable skin. However it does has its limits, as a servant or weapon capable of A-rank or higher attacks can get through. Rider suffered from severe(though nowhere near fatal) bruises all over his body after his fight with Hercules.
Oh Crap: He has this reaction when he sees that Moses has been beaten to the point of near-death and is telling him to run away. He gets another one a little while later when Moses tells him that Scathach is actually an incarnation of Victory.
Fragile Speedster/Glass Cannon: He has A+ Agility, but only C Strength and a pitiful E Endurance. His skill makes him a dangerous enemy, but he needs every bit of it to not get hit, because if he does, he's pretty much dead.
Master Swordsman: Stated in canon to be the most skilled fighter in the Fifth War. Able to come out against Lily with minuscule damage through expert swordsmanship and footwork, and fends off Nero seconds later. Of the Servants seen so far, undeniably the most skilled.
Pet the Dog: Persuades Medea to give Kojiro a talisman enabling him to fight beyond the temple, and treats him as a valued ally, purely because he thinks it'd be a shame for such a skilled swordsman to not see battle.
Wakeup Call Boss: Shares this position with Kojiro. But he goes a step further with him winning against Alter until he was forced to retreat.
Super Strength: When Sakura was her master again, her strength went from average C-rank all the way to A-rank(and all of her other parameters went up one rank as well) and she can push it further with her Monstrous Strength skill, becoming strong enough that even Nero has trouble matching her.
The Stoic: As per canon, she doesn't show much emotion, though she isn't afraid to speak her mind now that Shinji's dead.
Blood Magic: She uses her own blood to create a virus that cleanses Sakura's body.
Enemy Scan: She can analyze any body she sees, apparently down to the microscopic level.
Meaningful Name: It means "worshipful", appropriate for a religious zealot.
Took a Level in Badass: Compared to his typical summon (canon stats in Fate/Apocrypha), Henry rigged the summoning circle to make it seem like he had been summoned in India, granting him more Noble Phantasms and an increase in parameters.