History DemonicSpiders / FireEmblemHeroes

* Released from late Book V onward, Ascended Heroes are a special variant who also possess a significantly powerful skill kit compared to other heroes released around their time period. Even though they have their weaknesses, expect a lot of them to be here due to them generally hitting really hard and ending your team if you're not careful enough. And despite being something that might be spared from rotations (like for instance, the Brave Heroes), these aren't even spared from there, so have fun.

* '''Letizia'''. As a Green Tome Cavalier with a MightyGlacier statline, her base skills consist of Atk/Res Catch 4, A/R Far Trace 3, and Rouse Atk/Res 4, all of which boost her offenses and make her very bulky on the magical side, and her special Draconic Aura will hit even harder if she manages to charge it up. Of course, her Körmt is what makes her such an enormous threat. It gives +3 to her Atk, and if she’s above 25% HP (which she ''will'' be), she gains +6 Atk to herself, inflicts -6 Atk to her foe, and gets a guaranteed follow up during combat, and inflicts -3 Atk/Spd/Def/Res on foe for each one of the following conditions is met: if an ally is within 3 spaces of her, if there is another foe within 2 spaces of her target, if she has a [Bonus], and if there is a [Penalty] on the foe, up to -9 Atk/Spd/Def/Res, resulting in a stat swing of -15 Atk and -9 Spd/Def/Res from her Körmt alone. Combined with her base skills, she can gain up to ''+21 Atk and +15 Res'' while debuffing her foe with ''-18 Atk, -9 Spd/Def and -12 Res''. Being a Green Tome Cavalier with an incredibly absurd stat swing combined with a guaranteed follow up lets her easily outrange and KO your units while also being able to retreat thanks to her Trace skill, making her one of the worst units from the regular enemy pool to go up against, especially in modes like Tempest Trials and Allegiance Battles. Her Spd is very low, making it easy to double her, and she is weak to AntiCavalry weapons, but with the obscene amount of bulk her Körmt gives her along with her MightyGlacier statline (something that is rare among mage cavaliers), she’ll be a tough one to take out, let alone bait out.

* '''Regular Idunn''' is a pretty devastating unit that can spell an end to your team if you're not careful. Even for an armored unit, her mixed bulk is ''incredible'' - making it so that even with her low speed, most units won't be able to kill her in one round even if they double. Considering the fact she can't be debuffed at all, and in fact ''gets stronger'' if debuffed, she will most likely tank most things you throw at her, then retaliate and destroy anything that isn't a bulky blue unit. Thankfully Distant Counter isn't part of her kit.

* '''Female Alear''' is a LightningBruiser that is difficult to take down, with her having Atk/Spd Ideal 4, Close Call 4, and Spd Smoke 4 to give her a lot of Spd swing and DamageReduction, but her Líberation takes the cake. It gives -1 maximum special cooldown, and gives her [Charge] to herself and any support partners within 3 spaces of her at the start of her turn, +5 Atk/Spd/Def/Res during combat, inflicts -4 Spd/Def on the foe during combat as well as additional -4 Spd/Def during combat for each ally within 3 spaces of that are from different ''Fire Emblem'' titles, and reduces damage taken by 4% for each point of Spd she has over her foe, up to 40% damage reduced, all which activates if she is at 25% HP or above. Her having great mobility is difficult enough to fight against, but with everything in her favor she's going to reduce damage taken by '''92%''', where only specials like Lethality or Deadeye can take her down, unlike...
* '''Lucia'''. She is a LightningBruiser that is also difficult to take down, despite having Life and Death 4, where she makes up for that in sheer tankability, with her having Repel 4 and Even Tempest 3 to close the gap between her and her foe, but the most annoying part of her kit is her Queensblade. It gives +3 Atk, and gives her +5 Atk/Spd/Def/Res during combat, deals true damage equal to 20% of her Spd and reduces damage taken from the foe's first attack by 40%, all which activates if she is at 25% HP or above at the start of combat, but that's not the kicker; it also negates all these effects on both her and her foe: Specials before and during combat, defensive terrain, support effects, effects that guarantee and prevents follow-up attacks, prevents counterattacks, and changes priority, and all skills of foes and allies excluding her and her target. That's right, she '''will''' have a 1-on-1 match with no specials to trigger, meaning that not even specials like Lethality or Deadeye will mitigate her DamageReduction, and if you're out of luck you're going to see her tank a lot of hits and take down your units with ease.

* '''Ophelia''' can be deadly if not dispatched quickly in most modes. Her Chill Res 3 will make sure your designated Res tank gets debuffed, as Missiletainn's effect lets her turn her into a special nuke quickly enough. If she's grouped with other tome users, you'll fight one immediately with a special. The Special, Blazing Light, is an Area of Effect spell that damages the user based on her Atk minus her target's Def or Res. And Feh bless you if you have any units aligned to the target diagonally, as it'll damage those too. With this, she can easily finish off even bulky green units.. Thankfully her Special only activates during her phase, meaning you can attack her without her countering with one.

%%* '''Fallen Hardin''' serves as an incredible mixed tank, possessing high stats across the board - even his lowest stat, Spd, is still enough to stop enemy doubles if he's given some buffs. With good defenses and Atk, he can both take and deal tons of damage, especially since his default weapon Gradivus already comes with the Distant Counter effect built in. Better still, he has Bold Fighter 3 in his base kit, allowing him to attack twice and charge his specials faster when attacking foes. Even worse in gamemodes where refine for weapons are allowed on enemy units, the unique refine for his Gradivus gives him +4 Atk/Spd/Def/Res during combat and allows him to recover 7 HP during each attack he performs if his foe either initiates combat or is at full HP at the start of combat, meaning he will have greater sustainability if those conditions are met, but even then it more likely create a MortonsFork scenario. This combination of stats and skills overall makes him a terrifyingly strong unit.

* '''Regular Dimitri'''. He is a Lance Cavalier has MightyGlacier stats, but his skill set is the reason he's annoying to face against. He has Death Blow 4 and Lull Atk/Def to make sure that when he hits, he hits hard. The worst of it all is his Noble Lance: It gives him +3 Atk, and if either both him and the target are at full HP, or both are not at full HP, he gets a guaranteed follow-up attack. Because everyone is at full HP at the start of the map, outside of multimap modes, he ''will'' be doing a guaranteed follow-up on your units, and with his Death Blow 4 and Lull Atk/Def 3, he ''will'' be punching dents on your tanks. His only weakness is his low Res and below average Spd.
%%* '''Sirius'''. He's a unit you don't want to fight by himself, having a great Atk/Spd line that's boosted further by his weapon and kit. Along with a Killer effect, his weapon gives him +4 Atk/Spd/Def/Res if he's not adjacent to an ally, which is boost further by having Atk/Spd Solo 3 and Lull Atk/Spd 3, meaning he'll boost his Atk and Spd even further while preventing your units from having boosts in them ''and'' strengthen his own, his devastating strength all topped off by having Luna which he will more than likely will use with his incredible Spd.

* '''Yarne'''. His default kit makes him one of the few randomly generated named characters to possess Galeforce, making him rather dangerous. If you don't have any means of killing him quickly (his Res is thankfully pathetically low, meaning Tomes and Dragons can safely take care of him), he'll end up tearing your team apart by possibly activating Galeforce (unlike other characters who possess it, he can activate it fast, considering when he's at least at 75% HP, his special count ''drops by two'' after combat. He's also a Beast Cavalry, meaning you're already dealing with a long-range threat as well. Depending on the circumstances, he'll attack again and have the potential to kill two members from your team if you're not properly prepared. If refinable weapons are available, then things get worse as the refined version of Bunny Fang gives him +5 Atk/Spd during combat if he either is not adjacent to an ally or is at 90% HP or below at the start of combat, and the -2 special cooldown after combat to that threshold as well to make him trigger Galeforce easier, and the unique refine gives him an additional +5 Atk/Spd during combat, deals true damage equal to 10% of his Spd per attack during combat, and if he is transformed he gets a guaranteed follow-up attack, all which activates if the foe is at 50% HP or above at the start of combat, making not only faster and stronger, but is able to bypass even faster foes if they do not run any Null Follow-Up effects.

* '''Annette'''. Not only does have Rally Atk/Spd+ alongside Def/Res Ruse 3 to strengthen her ally and debuff your units while also likely keeping herself a way from the range of fire of your units, her weapon gives the unit she buffs ''+1 movement'', which the only units that thankfully do not get that movement buff is ranged cavaliers. On top of that, her weapon also lets her target the lower of a unit's Def/Res as well and with her great Atk, she'll definitely put a dent in even the bulkiest of units.

* '''Sara''' is a Staff unit who you should look out for. Being a SquishyWizard, she has the Kia Staff, which allows her to deal regular damage with her Staff attacks, which alongside her Atk/Spd Push 4, Dazzling Staff 3 and great Atk and Spd, she will be a pain to deal with if she initiates combat, and with her high Res and Joint Drive Res, she can shrug off most magic attacks. She is also annoying as a support unit, as not only she has Return+, which acts like Reposition and heals her target ally, but the other effect of Kia Staff allows her to gives +6 Atk/Spd and removes all debuffs to her ally within 4 spaces of her with the lowest HP at the start of her turn, and prioritizes units that have any debuffs on them first before units that do not, meaning that you have to be careful with the unit she is restoring to full condition, as they have the potential to be devastating against your units. However, with her low HP and poor Def, she will fall against strong physical attacks.

%% Before adding heroes to this page, make sure that whoever you're adding can be or were once randomly generated in modes such as Training Tower, Forging Bonds, Tempest Trials and Hall of Forms. This excludes Seasonal, Brave, Legendary and Mythic Heroes, heroes gained from rewards such as Tempest Trials and Grand Hero Battles, and heroes with a certain tag that make them never spawn, such as the refresher units and the Brave Redux and Farfetched Heroes, and the Fallen variants of Dimitri, Edelgard and Rhea. If they're annoying and/or dangerous to go against in the competitive modes such as Arena and Aether Raids, they go into HighTierScrappy/FireEmblemHeroes instead.

%% Before adding heroes to this page, make sure that whoever you're adding can be or were once randomly generated in modes such as Training Tower, Forging Bonds, Tempest Trials and Hall of Forms. This excludes Seasonal, Brave, Legendary and Mythic Heroes, heroes gained from rewards such as Tempest Trials and Grand Hero Battles, and heroes with a certain tag that make them never spawn, such as the refresher units and the Brave Redux and Farfetched Heroes, and the Fallen variants of Dimitri, Edelgard and Rhea. If they're annoying and/or dangerous to go against in the competitive modes such as Arena and Aether Raids, they go into the high or both category of TierInducedScrappy/FireEmblemHeroes instead.

With every new release of heroes, so to the likeliness of at least one of them being randomly being generated to be able to ruin your day thanks to their skills and/or weapons, especially if you have Auto-Battle on. Expect some overlap with heroes in the [[TierInducedScrappy/FireEmblemHeroes Tier Induced Scrappy]] and [[GameBreaker/FireEmblemHeroes Game Breaker]] entries for ''VideoGame/FireEmblemHeroes''.

* '''Ascended Idunn''', for similar reasons why Brave Hector is a High TierInducedScrappy post-refine. She's a MightyGlacier that has a skillkit that will exploit it to the fullest, with Bonfire, Sturdy Stance 3 and Wily Fighter 3, alongside D/R Near Save 3 just to make it already a pain to go against, but her Dew Dragonstone takes the cake. Dew Dragonstone gives her -1 maximum special cooldown, negates skills that deals effective damage against Armor units, deals effective damage against Armor units, deals adaptive damage against ranged foes, and if she's within 3 spaces of an ally she inflicts -5 Atk/Spd/Def/Res to the foe during combat, ignore field stat debuffs she has on her during combat and the foe cannot make a follow-up attack. With her skillkit {{No Sell}}ing a lot of things that can benefit her foe, she is going to very difficult to take down, with only effective against Dragons skills only being able to put a major dent in her, but considering her defenses it's going to be a difficult feat even with effective weapons, especially if she's near any allies.

* '''Sain'''. He is a LightningBruiser Lance Cavalier with high Atk, good Spd and Def, and low Res, coming with the skills Atk/Spd Catch 4, Flow Refresh 3 to bypass follow-up negation effects and heal 10 HP to him if he initiates combat, and Rally Up Atk+. His Jolly Jade Lance gives him +6 Atk/Spd if he initiates combat or if he’s within two spaces of an ally, Canto (Rem. +1), and worst of all, if he uses a Rally skill, he gains a +6 Atk/Spd buff and ''another action for himself''. Wanted to use your red unit to bait out a green enemy unit? Sain will suddenly move to use his Rally skill on that unit and then proceed to move again, destroy your red unit, and then retreat with his Canto. Even worse is if he appears in Allegiance Battles, as his extra action after using his Rally skill can lead to him either killing one of your units or getting killed on the wrong unit of your army (i.e. not a green unit who’s paired up), both of which will cause you to miss out on some points for that game mode. His low Res is his one weak stat, so magic damage can easily take him out, and AntiCavalry weapons will also help immensely, but trying to reach him can be tricky with all the skills he has going for him.

* '''Fallen Hardin''' serves as an incredible mixed tank, possessing high stats across the board - even his lowest stat, Spd, is still enough to stop enemy doubles if he's given some buffs. With good defenses and Atk, he can both take and deal tons of damage, especially since his default weapon Gradivus already comes with the Distant Counter effect built in. Better still, he has Bold Fighter 3 in his base kit, allowing him to attack twice and charge his specials faster when attacking foes. Even worse in gamemodes where refine for weapons are allowed on enemy units, the unique refine for his Gradivus gives him +4 Atk/Spd/Def/Res during combat and allows him to recover 7 HP during each attack he performs if his foe either initiates combat or is at full HP at the start of combat, meaning he will have greater sustainability if those conditions are met, but even then it more likely create a MortonsFork scenario. This combination of stats and skills overall makes him a terrifyingly strong unit.

* '''Hilda''' has her two Axe Infantry variants have a few things in common: be a GlassCannon/LightningBruiser, support her allies near her that have more Def than her, and be a walking nuke if she isn't near those allies.

* Staff users in Grand/Bound/Legendary Hero Battles. They tend to be armed with Dazzling or Wrathful Staff, which either means your units will be unable to counterattack, or your units will take more damage. And that's on top of how some of them carry Pain+ or Savage Blow with them, slowly chipping your HP away, or with staves that inflict nasty status effects such as Flash to make sure that anyone they hit will unable to counterattack other foes or Melancholy which inflict the Guard status and resets their special cooldown. If they don't have that, they'll generally heal hurt units like crazy, forcing you to rely on other ways of defeating them. Oh and some have Miracle (with a much lower charge), making it impossible to kill them as quickly as possible![[note]]It's worth noting that Fallen Takumi is considered one of the hardest Grand Hero Battles on Infernal since there are TWO staff users, on top of the other units you have to deal with.[[/note]]

* Most of the Fallen heroes are dangerous but manageable, but the ones released post-2020 are among the worst heroes to go against. Not only do they have optimized statlines, they also have skillkits that are often compared to Brave, Legendary, Mythic and Ascended Heroes, but like the latter they are randomly generated as enemy units, and so are a pain to go against if they are seen on the battlefield. Fortunately, the most powerful Fallen Heroes do not actually show up as randomly generated heroes, that being the Fallen variants of Dimitri, Edelgard, and Rhea.

* '''Regular Lethe''', as her weapon and A skill makes her bring trouble to players. She has Spd/Def Solo 3, and her Brazen Cat Fang gives her +3 Spd, and gives her +6 Atk/Spd during combat if she's not adjacent to any ally, and coupled with the Cavalry Beast effect of inflicting -4 Atk/Def on the foe during combat if she initiates, she hitting hard and fast. However, her low Res means that any decent Blue mage can take her down easily, but players need to be careful of her 3 movement.

* '''Yarne'''. His default kit makes him one of the few randomly generated named characters to possess Galeforce, making him rather dangerous. If you don't have any means of killing him quickly (his Res is thankfully pathetically low, meaning Tomes and Dragons can safely take care of him), he'll end up tearing your team apart by possibly activating Galeforce (unlike other characters who possess it, he can activate it fast, considering when he's at least at 75% HP, his special count ''drops by two'' after combat. He's also a Beast Cavalry, meaning you're already dealing with a long-range threat as well. Depending on the circumstances, he'll attack again and have the potential to kill two members from your team if you're not properly prepared.

* '''Regular Hilda'''. As a fast Axe Infantry, her skill kit will make great user of her GlassCannon stats. Her Freikugel gives her +3 Spd and all allies within 2 spaces of her +4 Atk/Spd if they have more Def than her, while she herself gets +6 Atk/Spd if she has no allies within 2 spaces of her with more Def than her. Now take into account the fact that she has Atk/Spd Solo 3, which gives her +6 Atk/Spd during combat if she is not adjacent to an ally, which means on a team with lower Def than her, she gains '''+12''' Atk/Spd during combat if she is alone. She also has Null Follow-Up to make sure that she laughs in the face of Axebreaker, the Fighter skills and the like. If refinable weapons are available to enemy units, then she gets worse as the refined version of Freikugel gives +4 Atk/Spd/Def/Res and ''prevents the foe from performing a follow-up attack'' to allies within 2 spaces of her if either that ally has more Def than her or she did not enter combat during that phase and she gives herself +6 Atk/Spd and deals damage equal to 10% of her Spd if she either is not within 2 spaces of an ally with higher Def than her or is not adjacent to an ally, and the unique refine gives her +5 Atk/Spd during combat and reduces damage taken from the foe's first attack by 40% if she is at 25% HP or above at the start of combat, making her a support unit to look out for as well. Her only weakness is her low Res and average HP, but good luck trying to defeating her in one round.

* '''Fallen Young Tiki'''. Essentially a rotational version of Legendary Tiki pre-refine, she packs the same incredible stats, Distant Counter in her weapon and effectiveness against Dragons... and doesn't have the color disadvantage that her Legendary counterpart does. Good luck if you don't have an Anti-Dragon or Anti-Armor weapon in your capacity, because someone in your team will die trying to kill her otherwise. In addition to also being able to abuse Fighter skills (like her native Special Fighter), she's also a LightningBruiser if she happens to be solo as well, since Solitary Dream not only gives her boosts to all of her stats, but lets her move as far as an Infantry unit, shutting down her previous weakness of low movement. Oh and even though she's not too rough during Forging Bonds (where her max level is 40), it's Tempest Trials and Hall of Forms where she becomes an absolute hell to deal with, especially if she's at the last map of the highest difficulty (or higher chambers in terms of Hall of Forms before they got rid of heroes released in Book III onwards entirely from there).

* Most of the Fallen heroes are dangerous but manageable, but the ones released post-2020 are among the worst heroes to go against. Not only do they have optimized statlines, they also have skillkits that are often compared to Brave, Legendary, Mythic and Ascended Heroes, but like the latter they are randomly generated as enemy units, and so are a pain to go against if they are seen on the battlefield. Fortunately, the most powerful Fallen Heroes do not actually show up as randomly generated heroes, that being the Fallen variant of Dimitri, Edelgard, and Rhea.

* '''Múspell''' brings a MightyGlacier statline that makes him difficult to take down, with his Flamelick Breath giving him +5 Atk/Spd/Def/Res during combat and the Fatal Smoke effect if he is at 25% HP or above at the start of combat, his Dragon Wall 3 granting him DamageReduction of 4% for each point of Res he has over his foe during combat, up to 40%, and Domain of Flame granting him +4 Atk/Def and adding true damage his first attack equal to 30% of the difference of his Atk over his foe's Res during combat if he is within 2 spaces of an ally, but the worst of all is that he can also gives Domain of Flame's effect to all allies within 2 spaces of him, which includes physical units. Combined with his Rally Up Atk+, he has a high chance to be near another ally to activate Domain of Flame's effect.

* '''Sirius'''. He's a unit you don't want to fight by himself, having a great Atk/Spd line that's boosted further by his weapon and kit. Along with a Killer effect, his weapon gives him +4 Atk/Spd/Def/Res if he's not adjacent to an ally, which is boost further by having Atk/Spd Solo 3 and Lull Atk/Spd 3, meaning he'll boost his Atk and Spd even further while preventing your units from having boosts in them ''and'' strengthen his own, his devastating strength all topped off by having Luna which he will more than likely will use with his incredible Spd.
* '''Perceval'''. He stands out among other Lance Cavaliers by being a LightningBruiser instead of a GlassCannon or MightyGlacier, while also being surprisingly tanky. He has Atk/Def Solo 3, Atk/Spd Lull 3 and Rouse Def/Res 3 to bolster his stats, but the worst of all is his Prized Lance: it gives him -1 special cooldown, and if the opponent is at full HP, he gains +4 Atk/Spd/Def/Res during combat ''and'' inflicts -1 special buildup for the opponent.

* '''Gerik''' is a pain to go up against thanks to his high HP to activate Sudden Panic and Infantry Pulse while also having Firesweep Axe+ and Darting Blow 4 to make use of his GlassCannon stats to make sure that he hits twice while also preventing counterattacks. Because of his high HP, any buff skills are actually a detriment to your units thanks to his Sudden Panic. His low Res and being unable to counterattack is his major downfall, however.

* '''Zeke''', while having a MightyGlacier statline, is more of a LightningBruiser with his Holy Gradivus not only having Distant Counter, but also grants him a guaranteed follow-up attack if he is at 25% HP or above at the start of combat. Bad enough on its own, but he also has Atk/Def Catch 4 and Def/Res Menace, both which synergize with each other. Combined with his Bonfire and Atk/Def Lull and you got someone who is both difficult to take down and bait out without AntiCavalry magic weapons.

* '''Letizia'''. As a Green Tome Cavalry with a MightyGlacier statline, her base skills consist of Atk/Res Catch 4, A/R Far Trace 3, and Rouse Atk/Res 4, all of which boost her offenses and make her very bulky on the magical side, and her special Draconic Aura will hit even harder if she manages to charge it up.. Of course, her Körmt is what makes her such an enormous threat. It gives +3 to her Atk, and if she’s above 25% HP (which she ''will'' be), she gains +6 Atk to herself, inflicts -6 Atk to her foe, and gets a guaranteed follow up during combat, and inflicts -3 Atk/Spd/Def/Res on foe for each one of the following conditions is met: if an ally is within 3 spaces of her, if there is another foe within 2 spaces of her target, if she has a [Bonus], and if there is a [Penalty] on the foe, up to -9 Atk/Spd/Def/Res, resulting in a stat swing of -15 Atk and -9 Spd/Def/Res from her Körmt alone. Combined with her base skills, she can gain up to ''+21 Atk and +15 Res'' while debuffing her foe with ''-18 Atk, -9 Spd/Def and -12 Res''. Being a Green Tome Cavalry with an incredibly absurd stat swing combined with a guaranteed follow up lets her easily outrange and KO your units while also being able to retreat thanks to her Trace skill, making her one of worst units from the regular enemy pool to go up against, especially in modes like Tempest Trials and Allegiance Battles. Her Spd is very low, making it easy to double her, and she is weak to anti-Cavalry weapons, but with the obscene amount of bulk her Körmt gives her along with her MightyGlacier statline (something that is rare among mage cavaliers), she’ll be a tough one to take out, let alone bait out.

* Enemies with Vantage, who will strike first if they are weakened. More often than not, this requires the player's units to one round their opposition, otherwise an opposing unit with Vantage would be able to strike first. This is an especially dangerous prospect if they have Distant Counter and/or a Special ready to unleash on their foes.

* Enemies with the Fatal Smoke skill, where not only will they prevent their target from healing during and after combat, but they will inflict the [Deep Wounds] status effect to the target and all of their allies within 2 spaces of that target, which those affected with that status effect will not be able to recover HP during their entire turn, so LifeDrain and HealThyself skills will not work on these users. This becomes especially bad if said enemy also has a skill and/or special that have deals damage outside of combat, such as the AOE specials and Poison Strike just to make sure that they stay damaged for other enemies to finish them off and players to waste turns to remove [Deep Wounds] and heal their damaged units.

* '''Regular Nailah''', despite with her FragileSpeedster statline, can sometimes catch players by surprise with her skill kit, which includes Distant Counter, Null C-Disrupt 3, and Glare, which inflicts [Gravity] to her target and all foes adjacent to that target if she attacked, alongside having Moonbow and her Wolf Queen Fang giving -1 maximum special cooldown, giving +2 Atk/Spd during combat for every ally within 2 spaces of her, up to +6, and allows her to deal +10 damage when her special triggers if she is transformed. Update 6.0 in early December, however, gave her a new overhaul, where her Wolf Queen Fang gained some new effects when it is refined, including the standard one for Infantry Beasts, as the +10 damage is replaced by +7 damage and allowing her to ignore skills that inflict -1 special buildup on her and grants +1 special buildup on the foe, and the new effects of Wolf Queen Fang allows her to gain +5 Atk/Spd during combat if either she is within 3 spaces of an ally or the foe is at 75% HP or above at the start of combat, and if both conditions are met she also inflicts -5 Atk/Def on the foe during combat, and the unique refine grants her [Canto (Rem. +1)] if she is transformed and +6 Atk/Spd/Def/Res and restores 7 HP per attack she performs if she is at 25% HP or above at the start of combat, making her Glare all the more worrisome thanks to her Canto.

* '''Regular Hilda'''. As a fast Axe Infantry, her skill kit will make great user of her GlassCannon stats. Her Freikugel gives her +3 Spd and all allies within 2 spaces of her +4 Atk/Spd if they have more Def than her, while she herself gets +6 Atk/Spd if she has no allies within 2 spaces of her with more Def than her. Now take into account the fact that she has Atk/Spd Solo 3, which gives her +6 Atk/Spd during combat if she is not adjacent to an ally, which means on a team with lower Def than her, she gains '''+12''' Atk/Spd during combat if she is alone. She also has Null Follow-Up to make sure that she laughs in the face of Axebreaker, the Fighter skills and the like. If refinable weapons are available to enemy units, then she gets worse as the refined version of Freikugel gives +4 Atk/Spd/Def/Res and ''prevents the foe from performing a follow-up attack'' to allies within 2 spaces of her if either that ally has more Def than her or she did not enter combat during that phase and she gives herself +6 Atk/Spd and deals damage equal to 15% of her Spd if she either is not within 2 spaces of an ally with higher Def than her or is not adjacent to an ally, and the unique refine gives her +5 Atk/Spd during combat and reduces damage taken from the foe's first attack by 40% if she is at 25% HP or above at the start of combat, making her a support unit to look out for as well. Her only weakness is her low Res and average HP, but good luck trying to defeating her in one round.

* '''Regular Velouria''' is a LightningBruiser that players should be careful about, as her Wolfpup Fang gives her +3 Spd and allows her to gain -2 special cooldown at the start of her first turn. Alongside her Luna being reduced to 1 cooldown and +10 damage when her special activates when she transforms (+7 damage with her refined version), if player are going to initiate on her they're going to be met with a very damaging attack if they don't take her down first, especially if they're not fielding any ranged units, who also has to go up against her Close Def 3. If refinable weapons are available to enemy heroes, then she gets +5 Atk/Spd during combat if she either initiates combat or is within 2 spaces of an ally, and the unique refine gives her an additional +5 Atk/Spd during combat if either she is transformed or the foe is at 75% HP or above at the start of combat. However, she can fall easily against magic attacks with her low Res, but Dragon units still have to worry about her.

* Staff users in Grand/Bound/Legendary Hero Battles. They tend to be armed with Dazzling or Wrathful Staff, which either means your units will be unable to counterattack, or your units will take more damage. And that's on top of how some of them carry Pain or Savage Blow with them, slowly chipping your HP away, or with staves that inflict nasty status effects such as Flash to make sure that anyone they hit will unable to counterattack other foes or Melancholy which inflict the Guard status and resets their special cooldown. If they don't have that, they'll generally heal hurt units like crazy, forcing you to rely on other ways of defeating them. Oh and some have Miracle (with a much lower charge), making it impossible to kill them as quickly as possible![[note]]It's worth noting that Fallen Takumi is considered one of the hardest Grand Hero Battles on Infernal since there are TWO staff users, on top of the other units you have to deal with.[[/note]]

* During Røkkr Sieges, just about every Røkkr that is either colorless or a dagger user (or [[BreadEggsBreadedEggs both]]). Colorless Røkkr are much more difficult to manage as they are outside of weapon triangle, which makes it impossible to build a team to abuse the 20% bonus provided by it (in particular, it's ''significantly'' harder to reach the 150000 damage needed to get the accessory vs colorless Røkkr). Meanwhile dagger using Røkkr are problematic due to their DamageIncreasingDebuff, forcing players to sacrifice damage for additional survivability, not to mention dagger users generally have enough Spd to avoid doubles from {{Mighty Glacier}}s and JackOfAllStats.

* Enemies with skills or weapons that prevent their enemies from counterattacking can make maps quite stressful. Units like Regular Faye or Roderick have Firesweep weapons, so the player cannot bait them out, which can potentially cost them time if they're encountered in the Tempest Trials. Regular Faye also has Wings of Mercy, which means she can blindside the player, while Roderick has Drag Back, pulling a player's unit away from formation. There are also the enemy Dazzling Staff users, who are very annoying to fight in the tougher Grand/Bound/Legendary/Mythic Hero Battles, especially since they can get free damage and status effects on the player's units in a mode where no units are allowed to die. Null C Disrupt can make your units counterattack these units, but it's currently only on 3 5-star units and Infantry are only allowed to inherit it, restricting Flying, Armor (besides Ascended Fjorm), and Cavalry units from using it.

** '''Fallen Mareeta'''. Her Shadow Sword gives her -1 special cooldown and if she initiate combat and is at 50% HP or over, she has any follow-up attacks go before the foe can counterattack, and if refinable weapons are available for enemy heroes then things get worse as not only does the HP threshold goes to 25% HP or above at the start of combat but adds +5 Atk/Spd during combat, and the unique refine gives an additional +5 Atk/Spd, ignore skills that inflict special buildup -X and inflicts -8 Spd on the foe during combat if they have more Spd than Def, but otherwise inflicts -8 Def instead, all which activates if the foe is at 75% HP or above at the start of combat. She also has Luna, Flashing Blade 4, and Null Follow-Up, which means with her natural high Spd, she will be dealing a lot of damage and possibly outright kill one of your units if she's fast enough. Her low Res and average Def makes her weak defensively, however, unlike...
** '''Regular Mareeta'''. She gets a ton of stats simply by being away from her allies. With her Mareeta's Sword and Atk/Spd Solo 3, she gets ''+10 Atk/Spd'', as well as +4 Def/Res during combat, and she'll also disable any skills that either guarantee your follow-up attacks or deny her follow-up attacks. In other words, you have to face her in a fair and square Spd check, which is no easy feat when her Spd is through the roof. Said Spd also helps her with her Close Call skill, which mitigates damage up to 40% depending on how much faster she is. Finally, she has Rouse Atk/Def 3 to bolster her stats further. In short, this essentially makes her much harder to defeat, but not to the extent like...
** '''Ascended Mareeta'''. She's a LightningBruiser with Atk/Spd Solo 4, Spurn and Even Tempest 3, and not only she has Vital Astra, but she has the weapon to exploit the DamageReduction effect of it to the fullest. Her Ascending Blade gives her -1 maximum special cooldown, gives her -1 special cooldown at the start of turn 1, but if she is at 25% HP or above at the start of combat, she gains +5 Atk/Spd/Def/Res during combat, the Null Follow-Up effect, and after combat she gives herself -1 special cooldown, so not only will she have Vital Astra charged up and ready to fire, but she will be doing this like a machine gun and reduces damage to a ludicrous degree.
** '''Shannan''' brings being a speed unit that can wall off physical attacks, bringing his Balmung, which if the foe either initiates combat or has full HP at the start of combat he gains +5 Atk/Spd/Def/Res and neutralizes any penalties on him, alongside Steady Posture 3, Wrath, Even Spd Wave, and finally Imperial Astra, which is the same as Ayra's Regnal Astra. That being said, he folds under easily with magical attacks on him.
** '''Regular Larcei''' is basically another version of her mother Ayra, and that mean trouble. She has Atk/Spd Solo 3, Repel and Panic Smoke to make things annoying, her weapon Larcei's Edge reduces her cooldown by 1 and give her +4 Atk/Spd/Def/Res and ignore any bonuses on her foes if either she has higher Spd than her foe at the start of combat or her foe is a full HP at the start of combat, and she brings her mother's Regnal Astra as well, which spells trouble.
* '''Regular Sigurd''', especially in modes like the Tempest Trials. He's a formidable unit, with great Def, bolstered further by Close Def, and while he may have low Res, his Divine Tyrfing basically gives him a free Aegis, halving any magic damage he takes. His Crusader's Ward will mitigate any further, consecutive ranged strikes to almost nothing. His Divine Tyrfing also got a refinement in which it gives him +5 Atk/Def if he's at 50% HP or over at the start of combat, and the unique refine gives him an additional +5 Atk/Def and gives him a guaranteed follow-up attack if his foe is at 50% HP or over at the start of combat, meaning that he will be a heavy hitting physical wall if he has that refinement, especially in Hall of Forms. Take too long to defeat him and [[LastChanceHitPoint Miracle]] will activate, letting him survive long enough to dish out more damage to your units. His only real weakness are dragons, especially blue ones, as none of his skills will protect him from them. Tough lance users can also make quick work of him, but they too should be careful if Sigurd has his refined Divine Tyrfing.

* '''Regular Tibarn'''. His Hawk King Claw gives him +3 Atk and if the foe is at full HP at the start of combat he has a guaranteed follow-up attack if he initiates combat, and he has a MightyGlacier statline to exploit it, as well as having Draconic Aura, Sturdy Impact, Chill Atk and Even Atk Wave 3 just to make things very painful. If refinements are available to him, then it gets worse as his Hawk King Claw gives that guaranteed follow-up attack as well as +5 Atk/Def during combat if either he is transformed or the foe is at 75% HP or above at the start of combat, and the unique refine gives him an additional +5 Atk/Def during combat and +1 special buildup per attack if he is at 25% HP or above at the start of combat. However, due to his MightyGlacier statline and low Res, he is vulnerable to fast Bows and magic units, especially if they're Blue, but one should still watch out for him.
* '''Regular Lethe''', as her weapon and A skill makes her bring trouble to players. She has Spd/Def Solo, which gives her +6 Spd/Def during combat if she's not adjacent to any ally, and her Brazen Cat Fang gives her +3 Spd, and gives her +6 Atk/Spd during combat if she's not adjacent to any ally, and coupled with the Cavalry Beast effect of inflicting -4 Atk/Def on the foe during combat if she initiates, she hitting hard and fast. However, her low Res means that any decent Blue mage can take her down easily, but players need to be careful of her 3 movement.

* '''Zofia's Call Catria'''. Her entire default skill kit is made to make her mobile and annihilate anyone not Blue and tanky. She has Atk/Spd Bond 4 to both give her +7 Atk/Spd and ignore any debuffs on those stats during if she's adjacent to an ally, and Aerobatics to give her great mobility with non-flier allies within 2 spaces of her. The worst of it all is her Astra Blade: It gives her +3 Atk, and if she has more Atk than the enemy's Def, she boost her damage by 50% of the difference between them, and this is after weapons triangle calculations are involved. This makes her a GlassCannon, but one should be careful baiting enemies when she's around them, as Aerobatics will make her move farther than she should and will finish anyone out of position.
* '''Fallen Ike''' is a major force to deal with, as he has Darting Breath to charge up his specials faster if the foe initiates combat, Repel to reduce damage he takes if he's faster than his foe, and Atk/Spd Oath to give him +5 Atk/Spd at the start of his turn, all to go along with his Mayham Aether and high Spd, but Chaos Ragnell is the worst of the bunch, as if he's debuffed at the start of combat, he reverses them during combat, so if you have skills such as Chill Spd and Chill Atk, you're just making him stronger during combat.

* '''Valentia Palla''' is a MightyGlacier that is difficult to bait and approach. Her Ladyblade, despite giving her -5 Spd, not only allows her to double attack regardless of phase, but also allows her to target the lower defensive stat of a foe during combat, so someone with low Def and/or Res needs to watch out for her, not helped with her sky high Atk, and with Ladyblade also giving [Canto (2)] (the first rotational unit to do so by default, since Sumia needs to have her Flower Lance and its unique refine to get Canto as well and Fallen Dimitri is barred from being randomly generated), alongside her Rally Atk/Def+, she's going to be difficult to bait out and chase down with her retreating after performing an action. Coupled with her Atk/Res Rein inflicting -4 Atk/Res to all foes within 2 spaces of her during combat and R Duel Flying 4 giving her +5 HP and +2 Atk/Spd/Def/Res and you got someone who can spell trouble by her presence alone.
* '''Múspell''' brings a MightyGlacier statline that makes him difficult to take down, with his Flamelick Breath giving him +5 Atk/Spd/Def/Res during combat and the Fatal Smoke effect if he is at 25% HP or above at the start of combat, his Dragon Wall granting him DamageReduction 4% for each point of Res he has over his foe during combat, up to 40%, and Domain of Flame granting him +4 Atk/Def and adding true damage his first attack equal to 30% of the difference of his Atk over his foe's Res during combat if he is within 2 spaces of an ally, but the worst of all is that he can also gives Domain of Flame's effect to all allies within 2 spaces of him, which includes physical units. Combined with his Rally Up Atk+, he has a high chance to be near another ally to activate Domain of Flame's effect.

* '''Regular Igrene''' brings a very strong kit, and a GlassCannon to go along with it. Her Guardian's Bow has -1 special cooldown and inflicts -5 Atk/Spd/Def on the foe if she's faster than them, alongside Blazing Wind, Life and Death 4, Special Spiral and Pulse Smoke just to make things harder when she initiates combat. However, since she is still a GlassCannon with her low defenses with everything equipped, any strong attackers will take her down in one round.
* '''Kiria''' is a walking debuff. While she is a SquishyWizard, her Mirage Rod inflicts -6 Atk/Res to any enemies within 2 spaces of her during combat, and she has Lull Atk/Res, which inflicts on the foe -3 Atk/Res and ignores any field buffs on those stats during combat, so she inflicts '''-9''' Atk/Res, making her surprisingly tanky, and alongside Atk/Res Solo 3, Tome and Staff units will have a hard time taking her down. However, her low Spd and average HP and Def means that any decent physical attacker will fell her easily.

* Surviving a special from '''Regular Lysithea''' is nigh impossible, even for the bulkiest of blue tanks. Lysithea's insane Atk stat, her Hades Ω giving her -1 maximum special cooldown, +4 Atk/Spd during combat if she initiates combat and an additional +6 Atk if she has her special ready at the start of combat, and combined with her Moonbow, Death Blow 4, Lull Spd/Res and Time's Pulse, she has a high chance to nuke one of your units off the map. The only thing stopping her from being a very powerful nuking machine is that she's a very extreme SquishyWizard[=/=]GlassCannon.
* '''Fallen Julia''', despite being a SquishyWizard, is a major force to deal with, especially alone with her weapon Dark Scripture and A Skill Atk/Res Solo 4. Dark Scripture give her +3 Atk and, when she's alone, allows her to inflict -6 Atk/Res on the foe, and if they don't have any Dragon effectiveness on them, she gets a guaranteed follow-up attack. That's not all: she also has Light and Dark from her Legendary variant, meaning that she inflicts -2 Atk/Spd/Def/Res on her foe during combat, ignore any field stat buffs the foe has, and negate any skills that target the user's lower defensive stats, meaning that any field stat buffs will not help you defend against her. In fact, she has Panic Smoke, meaning that any field stat buffs will hinder your units further against her if she attacks after combat. She thankfully has low Spd and Def, but if she initiates on your units, unless they either have high natural Res and/or are Blue, they're more likely as good as dead.
* If you're relying on field stat buffs, then '''Azelle''' will most likely be the end of them. With a GlassCannon statline, he brings Rally Up Spd+, R Duel Infantry 4, Spd/Res Ruse and Joint Hone Spd, making him an annoying support unit, but his Sparking Tome is the worst of all, as it give him +3 Spd and if his foe is at 50% HP or above at the start of combat he inflicts -6 Spd/Res on the foe during combat, as well as basically reverse any field stat buffs on those stats the foe has during combat, where having any field stat buffs on your unit's Spd and/or Res is a ''bad'' idea against him. With that said, his GlassCannon statline means that any strong Blue units can take him down easily.
* '''Fallen Male Morgan''' is somebody you should be careful fighting with, as his Tome of Despair will give him +3 Atk and these effects if he is at 25% HP or above at the start of combat: inflict -6 Atk/Res on the foe during combat, and if the sum of the total field stat buffs he has and the total field stat debuff his target has is 5+ he will deny any of his foe's follow-up attacks, 10+ will guarantee his follow-up attack, and +15 he will inflict -1 special buildup on his foe during combat. That is bad enough, but he also packs Iceberg, Atk/Res Solo 4, Sabotage Def, and Atk/Res Menace, meaning that the last skill alone gives him a 24 stat swing, which is more than enough to active all the effects of his Tome of Despair. Coupled with his MightyGlacier statline and you got a threat that is difficult to bait out, approach, and possibly even take down.
* '''Constance''', despite being a GlassCannon, is somebody who you don't want to initiates on your units. She brings Atk/Spd Push 4, A/S Far Trace, and Spd/Res Rein 3 to boost her damage and Spd to ludicrous levels, but the worst of all is her Agnea's Arrow: It gives her +3 Spd, and gives her +6 Atk/Spd during combat, ignore skills that deny any of her follow-up attacks, ignore any field stat buffs on the foe's Spd and Res during combat on odd turns, and any field stat debuffs on her Atk and Spd on even turns, all which activates if she either initiates combat or is within 2 spaces of an ally. However, her low defenses and weakness to Bows allows players to take her down easily, but one should still be careful about her.
* '''Volke''' has the potential to assassinate one of your units if you're not careful with him. His Fireman's Hook gives him -1 maximum special cooldown, the -7 Def/Res effect of daggers, and if he either initiates combat or is not adjacent to an ally, he gain +5 Atk/Spd/Def/Res during combat, allows him to ignore skills that inflict -1 special buildup on him per attack, and gives him +1 special buildup, which is already bad on it's own. He also comes with Steady Impact, Null Follow-Up and Time's Pulse, but the worst of all is Lethality, a special he is introduced with, as it is a 4 cooldown special that ignores 75% of the foe's defenses during combat and ignore all non-special DamageReduction skills on the foe when it triggers, which means that it's at 3 cooldown with his Fireman's Hook, and that with everything in his favor his second attack will trigger Lethality, which is most likely ending with a dead unit on your team, and with his high Atk in his LightningBruiser statline combined with his Atk boosting weapon and Sturdy Impact, not many can survive against him if he initiates on them. The only way to make him not a threat is to catch him off guard with strong units, but trying to bait him out is a major risk in itself.

* '''Fallen Hardin''' serves as an incredible mixed tank, possessing high stats across the board - even his lowest stat, Spd, is still enough to stop enemy doubles if he's given some buffs. With good defenses and Atk, he can both take and deal tons of damage, especially since his default weapon Gradivus already comes with the Distant Counter effect built in. Better still, he has Bold Fighter skill in his base kit, allowing him to attack twice and charge his specials faster when attacking foes. Even worse in gamemodes where refine for weapons are allowed on enemy units, the unique refine for his Gradivus gives him +4 Atk/Spd/Def/Res during combat and allows him to recover 7 HP during each attack he performs if his foe either initiates combat or is at full HP at the start of combat, meaning he will have greater sustainability if those conditions are met, but even then it more likely create a MortonsFork scenario. This combination of stats and skills overall makes him a terrifyingly strong unit.
* '''Regular Nailah''', despite with her FragileSpeedster statline, can sometimes catch players by surprise with her skill kit, which includes Distant Counter, Null C-Disrupt, and Glare, which inflicts [Gravity] to her target and all foes adjacent to that target if she attacked, alongside having Moonbow and her Wolf Queen Fang giving -1 maximum special cooldown, giving +2 Atk/Spd during combat for every ally within 2 spaces of her, up to +6, and allows her to deal +10 damage when her special triggers if she is transformed. Update 6.0 in early December, however, gave her a new overhaul, where her Wolf Queen Fang gained some new effects when it is refined, including the standard one for Infantry Beasts, as the +10 damage is replaced by +7 damage and allowing her to ignore skills that inflict -1 special buildup on her and grants +1 special buildup on the foe, and the new effects of Wolf Queen Fang allows her to gain +5 Atk/Spd during combat if either she is within 3 spaces of an ally or the foe is at 75% HP or above at the start of combat, and if both conditions are met she also inflicts -5 Atk/Def on the foe during combat, and the unique refine grants her [Canto (Rem. +1)] if she is transformed and +6 Atk/Spd/Def/Res and restores 7 HP per attack she performs if she is at 25% HP or above at the start of combat, making her Glare all the more worrisome thanks to her Canto.

* '''Regular Dimitri'''. He is a Lance Cavalier has MightyGlacier stats, but his skill set is the reason he's annoying to face against. He has Death Blow 4 and Lull Atk/Def to make sure that when he hits, he hits hard. The worst of it all is his Noble Lance: It gives him +3 Atk, and if either both him and the target are at full HP, or both are not at full HP, he gets a guaranteed follow-up attack. Because everyone is at full HP at the start of the map, outside of multimap modes, he ''will'' be doing a guaranteed follow-up on your units, and with his Death Blow 4 and Lull Atk/Def, he ''will'' be punching dents on your tanks. His only weakness is his low Res and below average Spd.
* '''Sirius'''. He's a unit you don't want to fight by himself, having a great Atk/Spd line that's boosted further by his weapon and kit. Along with a Killer effect, his weapon gives him +4 Atk/Spd/Def/Res if he's not adjacent to an ally, which is boost further by having Atk/Spd Solo 3 and Lull Atk/Spd, meaning he'll boost his Atk and Spd even further while preventing your units from having boosts in them ''and'' strengthen his own, his devastating strength all topped off by having Luna which he will more than likely will use with his incredible Spd.
* '''Perceval'''. He stands out among other Lance Cavaliers by being a LightningBruiser instead of a GlassCannon or MightyGlacier, while also being surprisingly tanky. He has Atk/Def Solo 3, Atk/Spd Lull and Rouse Def/Res 3 to bolster his stats, but the worst of all is his Prized Lance: it gives him -1 special cooldown, and if the opponent is at full HP, he gains +4 Atk/Spd/Def/Res during combat ''and'' inflicts -1 special buildup for the opponent.
* '''Fallen Male Corrin'''. This Infantry Dragon is just a few stats away from reaching Gen 4 ''Armored'' units, having incredible stats across the board. However, it's his entire skill kit that is the most worrying about him. His Brutal Breath gives him up to +5 Atk/Spd/Def/Res the less allies he has within 2 spaces of him, and inflicts -1 special cooldown to his foe if he has one or no allies within the same range, Atk/Spd Solo 4, Rouse Spd/Def 3 and Null Follow-Up just to make things harder. Unlike his female counterpart, he is blue, but that also means that anyone not green or with dragon effective weapons will be dragon food to him if he's not handled properly.
* '''Gatrie''' is a MightyGlacier with one of the highest Def stats in ''Heroes'', and that means trouble if you're using primarily physical units, and that gets higher with his default Spirited Lance+, Fortress Def/Res 3, and Crafty Fighter to make him difficult to take down, alongside having Moonbow. His only real weakness is his low Spd and average Res, as well as strong units with AntiArmor weapons, but the former is compensated by his Crafty Fighter, and his average Res is nothing to sneeze at.
* '''Duessel''' is another unit you don't want to fight by himself, as he is a MightyGlacier that has skills that will raise his defenses sky high, to the point that they can reach the ''50~60s'' range. Obsidian Lance gives him +3 Def and a guaranteed follow-up attack and inflicts -6 Atk/Def on the foe during combat if he's not adjacent to an ally, alongside with him having Bonfire, Def/Res Solo 4, Lull Atk/Def, and Rouse Def/Res 3. The only reasonable way to stop him is to target his lower Res, but even then that's nothing to sneeze at without any AntiCavalry magic weapons.
* '''Regular Ingrid''' is basically a more powerful version of Roderick, as she has a GlassCannon statline, and has the skillkit to exploit it, with Lúin giving her -1 special cooldown, and if she either initiates combat or is within 2 spaces of an ally, she gains +6 Spd, deal damage equal to 20% of her Spd, and if she has 5 or more Spd higher than her foe during combat, she prevents their counterattacks. What's more, she also has Atk/Spd Solo 4, Lull Spd/Def and Rouse Atk/Spd 3 in order to make sure that her Spd reaches high enough and lower her foe's Spd enough to make sure that she prevents her foe from counterattacking, and finally Moonbow to pierce through her foe's defenses. Because she is still a GlassCannon, players can easily take her down, but they otherwise have to be careful not to allow her to initiate combat.

* '''Ascended Idunn''', for similar reasons why Brave Hector is a High TierInducedScrappy post-refine. She's a MightyGlacier that has a skillkit that will exploit it to the fullest, with Bonfire, Sturdy Stance 3, and Wily Fighter, alongside D/R Near Save just to make it already a pain to go against, but her Dew Dragonstone takes the cake. Dew Dragonstone gives her -1 maximum special cooldown, negates skills that deals effective damage against Armor units, deals effective damage against Armor units, deals adaptive damage against ranged foes, and if she's within 3 spaces of an ally she inflicts -5 Atk/Spd/Def/Res to the foe during combat, ignore field stat debuffs she has on her during combat and the foe cannot make a follow-up attack. With her skillkit {{No Sell}}ing a lot of things that can benefit her foe, she is going to very difficult to take down, with only effective against Dragons skills only being able to put a major dent in her, but considering her defenses it's going to be a difficult feat even with effective weapons, especially if she's near any allies.

** '''Ascended Ishtar''' has by default Luna, Life and Death 4, Lull Spd/Res and Time's Pulse, but what makes it all work together is her Thunder's Mjölnir. It gives -1 maximum special cooldown, and she gains +6 Atk/Spd, ignore skills that inflict -1 special buildup on her and grants +1 special buildup on the foe, and if she initiates combat and has 10 or more Spd than her foe she can attack twice, all which activates if she is at 25% HP or above at the start of combat. Not only will she have her Luna be at 1 cooldown at the start of her turn, but if she's fast enough she will trigger it on her second attack before the foe can counterattack at all, so letting her initiate at all is asking for trouble. However, like her regular version she is still a GlassCannon thanks to her Life and Death 4.
* '''Ophelia''' can be deadly if not dispatched quickly in most modes. Her Chill Res will make sure your designated Res tank gets debuffed, as Missiletainn's effect lets her turn her into a special nuke quickly enough. If she's grouped with other tome users, you'll fight one immediately with a special. The Special, Blazing Light, is an Area of Effect spell that damages the user based on her Atk minus her target's Def or Res. And Feh bless you if you have any units aligned to the target diagonally, as it'll damage those too. With this, she can easily finish off even bulky green units.. Thankfully her Special only activates during her phase, meaning you can attack her without her countering with one.
* If you're fielding any Tome units, then '''Guinivere''' would most likely spell the end of them if you're not careful. Her Aureola gives her +3 Res, gives her +5 Atk/Spd/Res during combat and ignore any skills that targets her lower defensive stat if she either initiates combat or is within 2 spaces of an ally, and recovers 7 HP to herself and all allies within 2 spaces of her after combat, even if she didn't attack, but most importantly Aureola allows her to deal effective damage against Tome units. Already bad by itself, but since she comes with Atk/Res Push 4, Lull Atk/Res, and Joint Drive Res, only very strong magical units will even reach her sky high Res, while she also will take them down with ease with her great Atk and Spd. However, she is also a SquishyWizard, so she can fall easily against physical attack, but be careful when she initiates combat.
* '''Regular Sacred Stone Selena''' is somebody who you don't want to initiate on your units, as her GlassCannon statline is further bolstered with Life and Death 4, which alongside her Tome of Storms, which gives her +3 Spd, and if her foe is at 75% HP or above at the start of combat she gains +5 Atk/Spd during combat as well as negate any skills that deny any of her follow-up attacks as well as skills that guarantee the foe's follow-up attacks. She is also an annoying support unit, as she has Rally Atk/Res+ and Atk/Res Ruse to boost her ally and debuff her foes within cardinal directions of her and her ally she is Rallying, but this can get bad if her ally has a Rally skill to activate her Atk/Res Ruse. However, her GlassCannon statline means that her defenses are poor and therefore she will fall against anyone with a good Atk, but players need to be careful baiting her out first.
* '''Hapi''' is a SquishyWizard that you do not want to attack your units at all, similar to the above Lysithea. She brings Glimmer, Atk/Res Catch 4 and A/R Far Trace to boost her Res and bolster her Atk further. The worst of all, however, is her Demonic Tome, which deals effective damage against Dragons and Beasts, gives her -1 maximum special cooldown, +6 Atk/Res during combat if she is at 25% HP or above at the start of combat, and finally gives -1 special cooldown at the start of her turn if she is at maximum special cooldown. Because of this, not only her Glimmer is at 1 special cooldown, it also means that she always has it ready, resulting her in firing off Glimmers at every opportunity she can get, and thanks to her sky high Atk, it's going to hurt a lot, and with her sky high Res, magic attacks will barely dent her. With that said, she also has low Spd and Def, so she can easily be taken down, but good luck baiting her out in the first place.

* '''Yarne'''. His weapon kit makes him one of the few randomly generated named characters to possess Galeforce, making him rather dangerous. If you don't have any means of killing him quickly (his Res is thankfully pathetically low, meaning Tomes and Dragons can safely take care of him), he'll end up tearing your team apart by possibly activating Galeforce (unlike other characters who possess it, he can activate it fast, considering when he's at least at 75% health, his special count ''drops by two'' after he attacks. He's also a Beast Cavalry, meaning you're already dealing with a long-range threat as well. Depending on the circumstances, he'll attack again and have the potential to kill two members from your team if you're not properly prepared.

* '''Regular Hilda'''. As a fast Axe Infantry, her skill kit will make great user of her GlassCannon stats. Her Freikugel gives her +3 Spd and all allies within 2 spaces of her +4 Atk/Spd if they have more Def than her, while she herself gets +6 Atk/Spd if she has no allies within 2 spaces of her with more Def than her. Now take into account the fact that she has Atk/Spd Solo 3, which gives her +6 Atk/Spd during combat if she is not adjacent to an ally, which means on a team with lower Def than her, she gains '''+12''' Atk/Spd during combat if she is alone. She also has Null Follow-Up to make sure that she laughs in the face of Axebreaker, the Fighter skills and the like. Her only weakness is her low Res and average HP, but good luck trying to defeating her in one round.

* '''Mamori'''. With an already strong defensive statline, her Mirage Axe is what makes her especially tanky in that not only does she get +6 Def/Res during combat, she also prevents enemy follow-ups attacks, both of which if she has so much as one ally within 2 spaces of her, which is even harder to prevent since being an armoured unit means she's not moving too far from her allies. Top it off with Shield Session, which gives her up to ''+9'' Def/Res during combat depending on how many units have acted and you have a unit who's incredibly hard to get rid of.
* '''Annette'''. Not only does have Rally Atk/Spd+ alongside Def/Res Ruse to strengthen her ally and debuff your units while also likely keeping herself a way from the range of fire of your units, her weapon gives the unit she buffs ''+1 movement'', which the only units that thankfully do not get that movement buff is ranged cavaliers. On top of that, her weapon also lets her target the lower of a unit's Def/Res as well and with her great Atk, she'll definitely put a dent in even the bulkiest of units.
* '''Jill''' is a LightningBruiser you don't want to initiate on your units, as her Talregan Axe gives her +6 Atk/Spd during combat if she either initiates combat or is within 2 spaces of an ally, allows her to have any of her follow-up attacks go before the foe can counterattack, and since it gives -1 special cooldown, she's going to activate her Moonbow in order to make sure that one of your units will have a high chance of dying to her. Worse still is that she has the skill kit to exploit this, as she has Atk/Spd Push 4, Chill Atk/Spd, and Spd/Def Rein 3 in order to maximize her chances to defeating one of your units unharmed. With that said, her low Res is her biggest weakness, so any magic uses can take her down easily, but they should be careful that she's not in their range.
* '''Dedue'''. His skill kit is focused on one thing: defend his allies from melee attacks. Dedue come with A/D Near Save, meaning that if a melee unit initiates on an ally within 2 spaces of him and that ally is not on an intraverable tile like mountains or water, and is also not within 2 spaces of another unit with a Near Save skill, he takes the place of that ally during combat, and he gains +4 Atk/Def during combat. Combined with his Steadfast Axe+ and Sturdy Stance 3 alongside his great MightyGlacier statline, he is practically immune to physical hits. Because of this, players need to be careful with initiating with melee units, since they need to check if Dedue is within 2 spaces of them during combat and create a MortonsFork scenario. However, his poor Spd and average Res means that he will fall to magical attacks with ease, but good luck if you only have physical units on your team.
* '''Fallen Female Morgan''', like Jill, is someone you should be careful with if she initiates combat, as her Axe of Despair will give her -1 maximum special cooldown and these effects if she is at 25% HP or above at the start of combat: inflict -6 Atk/Def on the foe during combat, and if the sum of the total field stat buffs she has and the total field stat debuff her target has is 5+ she will deny any of his foe's follow-up attacks, 10+ will guarantee her follow-up attack, and +15 she will inflict -1 special buildup on his foe during combat. That is bad enough, but she also packs Glimmer, Atk/Def Solo 4, Dive-Bomb, and Atk/Def Menace, meaning that last skill alone gives her a 24 stat swing, which is more than enough to active all the effects of her Axe of Despair. Coupled with her MightyGlacier statline and you got a threat that is difficult to bait out, approach, and possibly even take down.
* '''Regular Charlotte''', after spending 4 years as a bride, brings pain if she initiates combat. She bring a GlassCannon statline and has the skills to exploit this, with her having Glimmer, Swift Sparrow 3, Frenzy, and Time's Pulse. The worst of all is her Fair-Fury Axe, which give her -1 maximum special cooldown, and allows her to gain +6 Atk/Spd during combat and gain true damage equal to 15% of her Atk during combat if she either initiates combat or is within 2 spaces of an ally. With Time's Pulse getting her Glimmer ready at all times and her sky high Atk and Spd, any attacks from her would most likely result in a dead unit. Her only weakness is her low defenses, so strong attacks against her can take her down just fine, but with Frenzy's DamageReduction and her high HP you're most likely need more than one unit to take her down.
* '''Ascended Fjorm''' is a LightningBruiser Armored Axe unit that basically acts as a better version of her Regular variant pre-refine. Her Nifl's Axe gives her -1 maximum special cooldown, has Distant Counter, and if she is within 2 spaces of an ally, she restores 7 HP after combat and ignore skills that deny her counterattacks if the foe wields a ranged weapon. She also has her regular variant's Ice Mirror (but thankfully not Ice Mirror II), Steady Posture 3 and Hardy Fighter. Finally, she has A/R Far Save to exploit all of that to the fullest, meaning that she's a bane to all ranged units, especially Staff units who usually depend on preventing foe's counterattacks to mitigate their low Def. However, her player phase is lacking and can be taken down by strong melee units, but if a player deploys only ranged units, she easily becomes one of the worst units to go against if she's near any allies.

* '''Regular Shamir''', normally a GlassCannon, is someone you shouldn't leave alone. A Green Infantry Bow, her Survivalist Bow gives her -1 special cooldown, and she gains +6 Atk/Spd during combat and if the foe is at 80% HP or above at the start of combat she prevents enemy counterattacks, if she is not adjacent to an ally. She also has Moonbow, Atk/Spd Solo 4, Null Follow-Up, and Rouse Atk/Spd 3, making her more stronger if she's not next to an ally and is guaranteed to deal serious damage if you let her initiate combat. However, because she has high offenses but low defenses, she can easily be taken down by any strong attacks, especially if they're red, but you still need to be careful trying to get her into range of those units.

* '''Regular Pent'''. While he is a SquishyWizard, he has G Duel Infantry 4 to further bolster his stats and Lull Atk/Res to give him more defenses and hit harder, but the worst thing about him is his Tome of Reglay, where it gives him +3 Atk, gives him +6 Atk/Spd during combat if his foe is at 75% HP or above at the start of combat, but most importantly gives himself and all his Tome allies within 2 spaces of him -1 special cooldown at the start of his turn if they're at maximum cooldown. Combined with his Time's Pulse, he's got his Glimmer already charged up at the start of his turns to allow him to potentially oneshot anyone not prepared for him, and he'll helping his Tome-wielding allies get their specials active faster, with some of them even getting it ready at the start of their turns, such as Regular Ishtar and Asbel mentioned above, making him a walking Time's Pulse to those allies as well.
* '''Letizia'''. Unlike Mirabilis and Nótt, Letizia is not a mythic unit for the midpoint banner of the book she’s featured in. This means that she’s in the regular enemy pool as a green tome cavalier with a MightyGlacier statline. Her base skills consist of Atk/Res Catch 4, A/R Far Trace 3, and Rouse Atk/Res 4, all of which boost her offenses and make her very bulky on the magical side, and her special Draconic Aura will hit even harder if she manages to charge it up. A/R Far Trace also lets her retreat after attacking if she doesn't use up all of her movement when she acts. Of course, her Körmt is what makes her such an enormous threat. It gives +3 to her Atk, and if she’s above 25% HP (which she ''will'' be), she gains +6 Atk to herself, inflicts -6 Atk to her target, and gets a guaranteed follow up during combat. It also inflicts -3 to all stats of her target each time one of the following four conditions is met: if an ally is within 3 spaces of her, if there is a foe within 2 spaces of her target, if she has a bonus active, and if there is a penalty on her target. This can stack up to -9 to all stats, and given the fast paced nature of the game modes she can show up in, all four conditions are very easy for her to meet, resulting in a stat swing of -15 Atk and -9 to the other three stats from her Körmt alone. Combined with her base skills, she can gain up to ''+21 Atk and +15 Res'' while debuffing her foe with ''-18 Atk, -9 Spd, -9 Def, and -12 Res''. Being a green mage cavalier with an incredibly absurd stat swing combined with a guaranteed follow up lets her easily outrange and KO your units while also being able to retreat thanks to her trace skill, making her one of, if not ''the'' absolute worst units from the regular enemy pool to go up against, especially in modes like Tempest Trials and Allegiance Battles. Her speed is very low, making it easy to double her, and she is weak to anti-cavalry weapons, but with the obscene amount of bulk her Körmt gives her along with her MightyGlacier statline (something that is rare among mage cavaliers), she’ll be a tough one to take out, let alone bait out.

* '''Regular Velouria''' is a LightningBruiser that players should be careful about, as her Wolfpup Fang gives her +3 Spd and allows her to gain -2 special cooldown at the start of her first turn. Alongside her Luna being reduced to 1 cooldown and +10 damage when her special activates when she transforms (+7 damage with her refined version), if player are going to initiate on her they're going to be met with a very damaging attack if they don't take her down first, especially if they're not fielding any ranged units, who also has to go up against her Close Defense 3. If refinable weapons are available to enemy heroes, then she gets +5 Atk/Spd during combat if she either initiates combat or is within 2 spaces of an ally, and the unique refine gives her an additional +5 Atk/Spd during combat if either she is transformed or the foe is at 75% HP or above at the start of combat. However, she can fall easily against magic attacks with her low Res, but Dragon units still have to worry about her.
* '''Fallen Young Tiki'''. Essentially a rotational version of Legendary Tiki, she packs the same incredible stats, Distant Counter in her weapon and effectiveness against Dragons... and doesn't have the color disadvantage that her Legendary counterpart does. Good luck if you don't have an Anti-Dragon or Anti-Armor weapon in your capacity, because someone in your team will die trying to kill her otherwise. In addition to also being able to abuse Fighter skills (like her native Special Fighter), she's also a LightningBruiser if she happens to be solo as well, since Solitary Dream not only gives her boosts to all of her stats, but lets her move as far as an Infantry unit, shutting down her previous weakness of low movement. Oh and even though she's not too rough during Forging Bonds (where her max level is 40), it's Tempest Trials and Hall of Forms where she becomes an absolute hell to deal with, especially if she's at the last map of the highest difficulty (or higher chambers in terms of Hall of Forms before they got rid of heroes released in Book III onwards entirely from there).
* '''Fallen Female Corrin'''. This Infantry Dragon packs BST comparable to Gen 2-3 ''Armored'' units, having incredible stats across the board. However, this isn't what makes her so strong - it's her weapon, which gives her up to +6 in ''every stat'' if she has no teammates nearby. As an enemy, Corrin is very liable to be the last one standing, meaning it's a lot easier for her weapon to fully activate than if a player is using her. Couple that with her native skills, like Atk/Spd Solo 3 to further boost her offensive power and Sudden Panic to debuff just about anyone on your team, and you have a unit that's disproportionately difficult to take down, and can easily kill off any of your units in retaliation. Back before the Hall of Forms had enemies from Book III onwards, many people generally avoided any Hall of Forms map if it includes her, as unlike the other randomly generated maps, this counts as a waste of a Forma Torch.

* '''Eleonora''' has a GlassCannon statline, but what makes her annoying is her weapon and A skill. She has Atk/Spd Push 4, which gives her +7 Atk/Spd during combat if she is at 25% HP or over before the start of combat, and her Mirage Bow gives her +3 Spd and if she is faster than her foe, ''prevents them from counterattacking''. Thanks to her high Spd she will negate counterattacks from the majority of the roster, while her fragility does not matter if she's faster than her foe, and this is before any buffs are applied to her Spd. She also has Rally Atk/Spd+ and Spd/Def Ruse to make sure that anyone within her and her ally's line of sight will be debuffed and won't build up their special while also giving her ally +6 Atk/Spd just to rub it in. With that said, her defenses are low, and coupled with her average HP, she will go down if any nuker attacks her.
* '''Leila''' is a GlassCannon, as she has Life and Death 4, but her Constant Dagger gives her +5 Atk/Spd during combat if she initiates, so she would most likely be able to one round anyone within her range, and thanks to her Rally Atk/Spd+ and Atk/Def Ruse, she will be debuffing your Atk/Def of your units and make sure that they will not build up their special while also giving +6 Atk/Spd to one of her allies. Since she is still a GlassCannon, however, she can fold under any strong attacker. Just be thankful that the second effect of her Constant Dagger does not activate if she's on the enemy side, unlike Eleonora before her.

* '''Sara''' is a Staff unit who you should look out for. Being a SquishyWizard, she has the Kia Staff, which allows her to deal regular damage with her Staff attacks, which alongside her Atk/Spd Push 4, Dazzling Staff and great Atk and Spd, she will be a pain to deal with if she initiates combat, and with her high Res and Joint Drive Res, she can shrug off most magic attacks. She is also annoying as a support unit, as not only she has Return+, which acts like Reposition and heals her target ally, but the other effect of Kia Staff allows her to gives +6 Atk/Spd and removes all debuffs to her ally within 4 spaces of her with the lowest HP at the start of her turn, and prioritizes units that have any debuffs on them first before units that do not, meaning that you have to be careful with the unit she is restoring to full condition, as they have the potential to be devastating against your units. However, with her low HP and poor Def, she will fall against strong physical attacks.
* '''Yuri''' is a GlassCannon with Glimmer, C Duel Infantry 4 and Time's Pulse. He is also tricky to take down, as he has Foul Play, which allows him to swap places with an ally 3 spaces of him, and his Honorable Blade will exploit that. Honorable Blade give him -1 maximum special cooldown, the standard [Dagger 7] effect, [Canto (2)], +1 movement at the start of his turn, and +6 Atk/Spd during combat if his foe is at 50% HP or above at the start of combat. With Time's Pulse charging his Glimmer every turn, he'll deal a lot of damage to his foe and use HitAndRunTactics thanks to his Honorable Blade's Canto, and he'll get any of his allies out of trouble with his Foul Play and still leave enough room to escape, giving them an unorthodox HitAndRunTactics as well. With that said, when players can take him down easily when they finally can attack him thanks to his low defenses, but good luck trying to catch him first.
* '''Wolf''' is a GlassCannon Colorless Bow Cavalier that you should be careful around if he initiates combat. He has Reposition, Life and Death 4, Def/Res Snag, and Panic Smoke, but the worst of all is his Keen Coyote Bow, which give him +3 Atk, deals effective damage against flying units, and if he is at 25% HP or above at the start of combat, he gains +6 Atk/Spd and allow him to have any of his follow-up attacks go before the foe can counterattack if he initiates combat. He basically acts like a better version of Regular Bernadetta, who needed to have a [Penalty] or not be at full HP to get the +5 Atk/Spd and Desperation effects on her Persecution Bow, which requires setup to activate, while he can stall out from attacking if he's far away from any foes with using Reposition on allies, making it hard to catch him off guard as well, but he easily goes down with a strong attack if players do catch him thanks to his low defenses and average HP.
* '''Ascended Laegjarn''' is a LightningBruiser Colorless Bow Cavalier that you should be careful with, especially if she has buffs. She has Moonbow, Swift Sparrow 3, A/D Far Trace, and Rouse Atk/Spd 4, but what makes her a pain to deal with is her Flame of Múspell, which gives her -1 maximum special cooldown, deals effective damage against flying units, gives her +6 Atk/Spd during combat and Atk/Spd/Def/Res equal to 50% of the total sum of field stat buffs she and her foe has if she has a [Bonus] active on her, which includes [Null Panic] from Rouse Atk/Spd 4, up to +12, and if the total is 10 or more she ignores skills that deny any of her follow-up attacks. So right from the get-go if Rouse Atk/Spd 4 activates she already gets +18 Atk/Spd and +6 Def/Res, which, in addition to her Swift Sparrow 3 and A/D Far Trace, that goes to +27 Atk, +26 Spd and +9 Def/Res, and that gets worse if there are addition buffs on her other stats and/or buffs on her foe as well, where in the worse case scenario she gets ''+33'' Atk, ''+32'' Spd, and +18 Def/Res. Her main weakness, however, is her poor Res, so any magic attacks on her, especially from AntiCavalry weapons, can take her down with ease, but one should still be careful baiting her out.
* '''Ascended Joshua''' is offense wise a better version of Leila, as he has a GlassCannon statline with Glimmer, Life and Death 4, Null Follow-Up and Green Feud to make thing bad already for your units, but the absolute worst is his Blade of Jehanna. It gives him -1 maximum special cooldown, and if he's at 25% HP or above at the start of combat allows him to inflict -6 Spd/Def as well as ignore bonuses on those stats on the foe during combat as well as gain certain effects depending on the position his foe is in compared to him: in cardinal directions he prevents the foe from counterattacking, and in diagonal directions he gains true damage equal to 15% of his foe's Atk during combat. This means positioning against him is another challenge when facing against him, but letting him initiate at all is asking for trouble. However, since he is a GlassCannon, his defenses as well as his average HP make him easy to take down.

%% Before adding heroes to this page, make sure that whoever you're adding can be or were once randomly generated in modes such as Training Tower, Forging Bonds, Tempest Trials and Hall of Forms. This excludes Seasonal, Brave, Legendary and Mythic Heroes, heroes gained from rewards such as Tempest Trials and Grand Hero Battles, and heroes with a certain tag that make them never spawn, such as the refresher units and the Brave Redux and Farfetched Heroes, and the Fallen variants of Dimitri and Edelgard. If they're annoying and/or dangerous to go against in the competitive modes such as Arena and Aether Raids, they go into the high or both category of TierInducedScrappy/FireEmblemHeroes instead.

* Thankfully Dancers don't have mook versions and can't be encountered at all in Tempest Trials (unless if the boss is a Dancer), Forging Bonds, Training Tower, or Hall of Forms, but you can still encounter them in some Bound Hero Battles (and even some Legendary and Mythic ones), Story Mode, and Paralogue maps in the form of named units. They can proceed to make your day into a living hell by giving an enemy an extra chance to move, thus messing up your run. Reyson and Leanne are worse, as their range when they're in Flying Beast forms are the same as cavalry, meaning if they're with a Beast ally (which in their maps, they're always sorted as such), you're guaranteed a world of hurt if you don't take them or their allies out quickly. Needless to say, most maps that start off with an enemy Dancer don't require you to be in their attack range for them to dance another foe in order to reach and attack your units faster, making you think twice about that "Danger Zone" area.

** '''Fallen Mareeta'''. Her Shadow Sword gives her -1 special cooldown and if she initiate combat and is at 50% HP or over, she has any follow-up attacks go before the foe can counterattack. She also has Luna, Flashing Blade 4, and Null Follow-Up, which means with her natural high Spd, she will be dealing a lot of damage and possibly outright kill one of your units if she's fast enough. Her low Res and average Def makes her weak defensively, however, unlike...

* '''Fallen Berkut''', unlike his regular variant, is an optimized MightyGlacier. Against melee foes, he will be struggling with; Against ''ranged'' foes, he will be tanking them like it's nothing. His Kreimhild will make him counterattack ranged foes ''and'' deny any of their follow-up attacks if he has an ally within 2 spaces of him, his Warding Stance 4 will give him +8 Res and slow down the foe's special buildup, and he has Odd Res Wave to give him +6 more Res during the start of odd turns. Of course, if he activates his Kreimhild, he inflicts 20 damage to his nearest ally, but if said ally has Escape Route...

* '''Regular Velouria''' is a LightningBruiser that players should be careful about, as her Wolfpup Fang gives her +3 Spd and allows her to gain -2 special cooldown at the start of her first turn. Alongside her Luna being reduced to 1 cooldown and +10 damage when her special activates when she transforms, if player are going to initiate on her they're going to be met with a very damaging attack if they don't take her down first, especially if they're not fielding any ranged units, who also has to go up against her Close Defense 3. However, she can fall easily against magic attacks with her low Res, but Dragon units still have to worry about her.

* If you're relying on field stat buffs, then '''Azelle''' will most likely be the end of them. With a GlassCannon statline, he brings Rally Up Spd+, R Duel Infantry 4, Spd/Res Ruse and Joint Hone Spd 4, making him an annoying support unit, but his Sparking Tome is the worst of all, as it give him +3 Spd and if his foe is at 50% HP or above at the start of combat he inflicts -6 Spd/Res on the foe during combat, as well as basically reverse any field stat buffs on those stats the foe has during combat, where having any field stat buffs on your unit's Spd and/or Res is a ''bad'' idea against him. With that said, his GlassCannon statline means that any strong Blue units can take him down easily.

* '''Regular Ishtar''' is a GlassCannon, possessing a great offensive statline. She also wields the tome Mjölnir, which accelerates her special trigger while giving her +6 Spd if she initiates combat. Combined with her naturally high offenses, Swift Sparrow 2 and the fact that she comes with Moonbow by default, she'll be able to both double and fire off specials at a ridiculous rate - and they're going to hurt ''a lot''. She's also extremely fast, especially with Mjölnir and Swift Sparrow active, which means she can double most units, save for already fast characters. Things gets worse if she spawns with the unique refine for her Mjölnir, where it gives her an additional +5 Atk/Spd during combat and ignore any skills that deny any of her follow-up attacks. Finally, since she was part of the Book II roster, she will spawn in Hall of Forms. However, while her bulk isn't as bad as some other mages, she's still a GlassCannon at her core and will fall quickly under enemy attacks.

* '''Regular Selkie'''. This Blue Beast Cavalier is a force of nature that players should fear going against if they're not prepared for her, due to her Foxkit Fang. It give her +3 Res, and if she has higher Res than the enemy and they wield a melee weapon, she gains +1 Atk/Spd/Def/Res during combat for every 2 Res she has higher than her foe, with a cap just to prevent her from being ''very'' annoying, and she has very high Res with her weapon equipped. 6 Res higher than her foe? She gains +3 Atk/Spd/Def/Res during combat. 16+ more? '''+8''' Atk/Spd/Def/Res, beating even ''Armored'' units in terms of BST at the time of her release, and helping her to gain those stats in combat is her default Even Res Wave. When weapon refinements are available to her, it gets worse as not only doe she get +4 Atk/Spd/Def/Res if she has more Res than her foe, but she also has the difference requirement to 80% instead and removes the melee foe requirement, where 10+ Res gives her the additional +8 Atk/Spd/Def/Res, and the unique refine gives her an additional +4 Atk/Spd/Def/Res, inflicts -1 special buildup on the foe during combat if she has higher Res than her foe, and ignores skills that deny any of her follow-up attacks if she has 5 or more Res higher than her foe, all which activates if she either initiates combat or is within 2 spaces of an ally, so she could have up to +16 Atk/Spd/Def/Res during combat, often making it a chore to take her down.

* '''Regular Shinon''' with hisskillkit is a nightmare to deal with. His Double Bow gives him -1 maximum special cooldown, and if he's not adjacent to an ally he gains +5 Atk/Spd/Def/Res during combat as well allowing him to counterattack regardless of range, which, alongside Time's Pulse, charges him sooner for his special skill Deadeye. He also brings Atk/Def Solo 4 and Lull Atk/Spd 3, which guarantees him to strike faster and harder than you if he's not adjacent with anyone. His only real weakness is that if he happens to be next to an ally, almost all of his advantages are shelved, but good luck if he happens to be the last foe on the map, or is otherwise spawned away from your other foes.

* Released from late Book 5 onward, Ascended Heroes are a special variant who also possess a significantly powerful skill kit compared to other heroes released around their time period. Even though they have their weaknesses, expect a lot of them to be here due to them generally hitting really hard and ending your team if you're not careful enough. And despite being something that might be spared from rotations (like for instance, the Brave Heroes), these aren't even spared from there, so have fun.

* '''Regular Selkie'''. This Blue Beast Cavalier is a force of nature that players should fear going against if they're not prepared for her, due to her Foxkit Fang. It give her +3 Res, and if she has higher Res than the enemy and they wield a melee weapon, she gains +1 Atk/Spd/Def/Res during combat for every 2 Res she has higher than her foe, with a cap just to prevent her from being ''very'' annoying, and she has very high Res with her weapon equipped. 6 Res higher than her foe? She gains +3 Atk/Spd/Def/Res during combat. 16+ more? '''+8''' Atk/Spd/Def/Res, beating even ''Armored'' units in terms of BST at the time of her release, and helping her to gain those stats in combat is her default Even Res Wave. When weapon refinements are available to her, it gets worse as not only doe she get +4 Atk/Spd/Def/Res if she has more Res than her foe, but she also has the difference requirement to 80% instead and removes the melee foe requirement, where 10+ Res gives her the additional +8 Atk/Spd/Def/Res, and the unique refine gives her an additional +4 Atk/Spd/Def/Res, inflicts -1 special buildup on the foe during combat if she has higher Res than her foe, and ignores skills that deny any of her follow-up attacks if she has 5 or more Res higher than her foe, so she could have up to +16 Atk/Spd/Def/Res during combat, often making it a chore to take her down.

* '''Regular Selkie'''. This Blue Beast Cavalier is a force of nature that players should fear going against if they're not prepared for her, due to her Foxkit Fang. It give her +3 Res, and if she has higher Res than the enemy and they wield a melee weapon, she gains +1 Atk/Spd/Def/Res during combat for every 2 Res she has higher than her foe, with a cap just to prevent her from being ''very'' annoying, and she has very high Res with her weapon equipped. 6 Res higher than her foe? She gains +3 Atk/Spd/Def/Res during combat. 16+ more? '''+8''' Atk/Spd/Def/Res, beating even ''Armored'' units in terms of BST at the time of her release, and helping her to gain those stats in combat is her default Even Res Wave. When weapon refinements are available to her, it gets worse as not only doe she get +4 Atk/Spd/Def/Res if she has more Res than her foe, but she also has the difference requirement to 80% instead and removes the melee foe requirement, where 10+ Res gives her the additional +8 Atk/Spd/Def/Res, and the unique refine gives her an additional +4 Atk/Spd/Def/Res, inflicts -1 special buildup on the foe during combat if she has higher Res than her foe, and ignores skills that deny any of her follow-up attacks if she has 5 or more Res higher than her foe, so she could have up to +'''24''' Atk/Spd/Def/Res during combat.

** '''Regular Mareeta'''. She's an Infantry Sword wielder who gets a ton of stats simply by being away from her allies. With her Mareeta's Sword and Atk/Spd Solo 3, she gets ''+10 Atk/Spd'', as well as +4 Def/Res during combat, and she'll also disable any skills that either guarantee your follow-up attacks or deny her follow-up attacks. In other words, you have to face her in a fair and square Spd check, which is no easy feat when her Spd is through the roof. Said Spd also helps her with her Close Call skill, which mitigates damage up to 40% depending on how much faster she is. Finally, she has Rouse Atk/Def 3 to bolster her stats further. In short, this essentially makes her much harder to defeat.

* '''Regular Tibarn'''. All flying beasts gain +1 movement if, at the start of their turn, they're adjacent to any beast or dragon allies and not adjacent to any other type of ally, meaning that if he's alone or is next to a beast or dragon ally, he has the movement of a cavalry unit (better make sure you know this when fighting him, because the Danger Zone will not tell you until he morphs into his beast form). Hawk King Claw gives him +3 Atk and if the opponent is at 100% HP he has a guaranteed follow-up attack if he initiates combat, and Sturdy Impact gives him +6 Atk, +10 Def, and ''negates any of the opponent's follow-up attacks'' if he initiates combat. When all but tanky units cannot take him on, he is certainly to be feared when faced against, and he even has enough Spd to make sure he can outspeed {{Mighty Glacier}}s with Quick Riposte or any of the defensive Fighter skills, should Sturdy Impact's nullification of denying any enemy follow-up attacks and his Hawk King Claw's guaranteed follow-up attack should be cancelled out.

* '''Regular Selkie'''. This Blue Beast Cavalier is a force of nature that players should fear going against if they're not prepared for her, due to her Foxkit Fang. It give her +3 Res, and if she has higher Res than the enemy and they wield a melee weapon, she gains +1 Atk/Spd/Def/Res during combat for every 2 Res she has higher than her foe, with a cap just to prevent her from being ''very'' annoying, and she has very high Res with her weapon equipped. 6 Res higher than her foe? She gains +3 Atk/Spd/Def/Res during combat. 16+ more? '''+8''' Atk/Spd/Def/Res, beating even ''Armored'' units in terms of BST at the time of her release. Helping her to gain those stats in combat is her default Even Res Wave. The only real weakness is that Foxkit Fang doesn't affect Ranged foes, both offensively and defensively, and her low Def, so a Dagger or Bow user that attacks her can stop her in her tracks, especially if they're Green.

* Enemies with skills or weapons that prevent their enemies from counterattacking can make maps quite stressful. Units like Regular Faye or Roderick have Firesweep weapons, so the player cannot bait them out, which can potentially cost them time if they're encountered in the Tempest Trials. Regular Faye also has Wings of Mercy, which means she can blindside the player, while Roderick has Drag Back, pulling a player's unit away from formation. There are also the enemy Dazzling Staff users, who are very annoying to fight in the tougher Grand/Bound/Legendary/Mythic Hero Battles, especially since they can get free damage and status effects on the player's units in a mode where no units are allowed to die.

* Enemies with Distant Counter, Close Counter, or any of the Close/Distant Foil/Ward skills, often built into their weapon. The player can often rely on ranged units to dispatch melee units and rely on melee units to dispatch ranged units without much retaliation. However, unless they can one-shot them, they will now have to face a counterattack, which can potentially be dangerous to the player's unit.

** '''Fallen Mareeta'''. Her Shadow Sword gives her -1 special cooldown and if she initiate combat and is at 50% HP or over, she has any follow-up attack go before the foe can counterattack. She also has Luna, Flashing Blade 4, and Null Follow-Up, which means with her natural high Spd, she will be dealing a lot of damage and possibly outright kill one of your units if she's fast enough. Her low Res and average Def makes her weak defensively, however, unlike...
** '''Regular Mareeta'''. She's an infantry sword wielder who gets a ton of stats simply by being away from her allies. With her weapon and Atk/Spd Solo 3, she gets ''+10 Atk/Spd'', as well as +4 Def/Res during combat, and she'll also disable any skills that either guarantee your follow-up attacks or deny her follow-up attacks. In other words, you have to face her in a fair and square Spd check, which is no easy feat when her Spd is through the roof. Said Spd also helps her with her Close Call skill, which mitigates damage up to 40% depending on how much faster she is. Finally, she has Rouse Atk/Def 3 to give her +6 Atk/Def at the start of her turn if she's not adjacent to an ally. In short, this essentially makes her much harder to defeat.
** '''Shannan''' brings a speed unit that can wall off physical units, bringing his Balmung, which if the foe either initiates combat or has full HP at the start of combat he gains +5 Atk/Spd/Def/Res and neutralizes any penalties on him, Steady Posture 3 which gives +6 Spd/Def and inflicts -1 special buildup on the foe if they initiate combat, Wrath to boost his special damage and also reduce his special cooldown by 1 at the start of each turn if he has taken enough damage, Even Spd Wave to give him +6 Spd at the start of even turns, and finally Imperial Astra, which is the same as Ayra's Regnal Astra. That being said, he folds under easily with magical attacks on him.
** '''Regular Larcei''' is basically another version of her mother Ayra, and that mean trouble. She has Atk/Spd Solo 3 to boost her Atk/Spd if she's not adjacent to an ally, Repel to both push one of your units back after she initiates combat while also making use of her high Spd to reduce damage, and Panic Smoke just to make sure that any bonuses on your heroes will be penalties instead. Her weapon Larcei's Edge reduces her cooldown by 1 and give her +4 Atk/Spd/Def/Res and ignore any bonuses on her foes if either she has higher Spd than her foe at the start of combat or her foe is a full HP at the start of combat.

* '''Regular Igrene''' brings a very strong kit, and a GlassCannon to go along with it. Her Guardian's Bow has -1 special cooldown and inflicts -5 Atk/Spd/Def on the foe if she's faster than them, but the worst of all is the rest of the skills. She has Blazing Wind, the best out of all the AOE specials in the game, Special Spiral, which gives her -2 special cooldown if she activated her special before or during combat, Pulse Smoke, which inflicts +1 special cooldown to the target and all foes within 2 spaces of the target up to their max special cooldown count, and Life and Death 4. However, since she is still a GlassCannon with her low defenses with everything equipped, any strong attackers will take her down in one round.
* '''Kiria''' is a walking debuff. While she is a SquishyWizard, her Mirage Rod inflicts -6 Atk/Res to any enemies within 2 spaces of her during combat, and she has Lull Atk/Res, which inflicts on the foe -3 Atk/Res and ignores any field buffs on those stats during combat, so she inflicts '''-9''' Atk/Res, making her surprisingly tanky. However, her low Spd and average HP and Def means that any decent physical attacker will fell her easily.
* '''Midori''' is just one of many bow users that shows that Takumi's nowhere near of a threat as he used to be. She has a slightly stronger variant of the Close Counter skill - Close Foil. She'll be granted +5 Atk/Def during combat if the foe wields a physical weapon and they initiate combat, giving her some room to survive an attack and strike back stronger, plus her Spendthrift Bow+ will make it so any attacker will have even lower Atk (she gains +7 Atk while also inflicting -7 Atk to her foe during combat). The only real weakness she has is that she has low Res and average Spd, meaning any Blue Dragons (since she's a Red bow) will defeat her with ease.
* Surviving a special from '''Regular Lysithea''' is nigh impossible, even for the bulkiest of blue tanks. Lysithea's insane Atk stat, combined with her busted weapon and ways to jack her attack stat to insane amounts, coupled with her kit helping with special acceleration and nullifying any buffs on their Res means that if you can't dash in and kill her first, you not probably, not maybe, but WILL get one of your units killed (Bye bye perfect AR offense) when her turn comes around. The only thing stopping her from being a GameBreaker is that she's a very extreme SquishyWizard[=/=]GlassCannon.

* '''Fallen Male Morgan''' is somebody you should be careful fighting with, as his Tome of Despair will give him +3 Atk and these effects if he is at 25% HP or above at the start of combat: inflict -6 Atk/Res on the foe during combat, and if the sum of the total field stat buffs he has and the total field stat debuff his target has is 5+ he will deny any of his foe's follow-up attacks, 10+ will guarantee his follow-up attack, and +15 he will inflict -1 special buildup on his foe during combat. That is bad enough, but he also packs Iceberg, Atk/Res Solo 4, Sabotage Def, and Atk/Res Menace, where at the start of his turn if a foe is within 4 spaces of him, he inflicts -6 Atk/Res to the nearest foes and gives himself +6 Atk/Res, meaning that skill alone gives him a 24 stat swing, which is more than enough to active all the effects of his Tome of Despair. Coupled with his MightyGlacier statline and you got a threat that is difficult to bait out, approach, and possibly even take down.
* '''Constance''', despite being a GlassCannon, is somebody who you don't want to initiates on your units. She brings Atk/Spd Push 4, A/S Far Trace, and Spd/Res Rein to boost her damage and Spd to ludicrous levels, but the worst of all is her Agnea's Arrow: It gives her +3 Spd, and gives her +6 Atk/Spd during combat, ignore skills that deny any of her follow-up attacks, ignore any field stat buffs on the foe's Spd and Res during combat on odd turns, and any field stat debuffs on her Atk and Spd on even turns, all which activates if she either initiates combat or is within 2 spaces of an ally. However, her low defenses and weakness to Bows allows players to take her down easily, but one should still be careful about her.

* '''Fallen Hardin''' serves as an incredible mixed tank, possessing high stats across the board - even his lowest stat, speed, is still enough to stop enemy doubles if he's given some buffs. With good defenses and Atk, he can both take and deal tons of damage, especially since his default weapon Gradivus already comes with the Distant Counter effect built in. Better still, he has Bold Fighter skill in his base kit, allowing him to attack twice and charge his specials faster when attacking foes. Even worse in gamemodes where refine for weapons are allowed on enemy units, the unique refine for his Gradivus gives him +4 Atk/Spd/Def/Res during combat and allows him to recover 7 HP during each attack he performs if his foe either initiates combat or is at full HP at the start of combat, meaning he will have greater sustainability if those conditions are met, but even then it more likely create a MortonsFork scenario. This combination of stats and skills overall makes him a terrifyingly strong unit.

* '''Regular Selkie'''. This Blue Beast Cavalier is a force of nature that players should fear going against if they're not prepared for her. As a Beast Cavalry, she have 3 Movement and a default weapon effect for cavalry that denies enemy follow-up attacks, as well as inflict -4 Atk/Def if she initiates combat and is transformed, but it's her weapon that makes her a pain to go against: Foxkit Fang. It give her +3 Res, and if she has higher Res than the enemy and they wield a melee weapon, she gains +1 Atk/Spd/Def/Res during combat for every 2 Res she has higher than her foe, with a cap just to prevent her from being ''very'' broken, and she has very high Res with her weapon equipped. 6 Res higher than her foe? She gains +3 Atk/Spd/Def/Res during combat. 16+ more? '''+8''' Atk/Spd/Def/Res, beating even ''Armored'' units in terms of BST. Helping her to gain those stats in combat is her default Even Res Wave, which gives her +6 Res at the start of even turns, giving her more Res to make her weapon work. The only real weakness is that Foxkit Fang doesn't affect Ranged foes, both offensively and defensively, and her low Def, so a Dagger or Bow user that attacks her can stop her in her tracks, especially if they're Green.

* '''Regular Dimitri'''. He is a Lance Cavalier has MightyGlacier stats, but his skill set is the reason he's annoying to face against. He has Death Blow 4 to give him +8 Atk if he initiates combat, and Lull Atk/Def which inflict -3 Atk/Def on the target, as well as negate any field buffs on the target's Atk/Def during combat. The worst of it all is his Noble Lance: It gives him +3 Atk, and if either both him and the target are at full HP, or both are not at full HP, he gets a guaranteed follow-up attack. Because everyone is at full HP at the start of the map, outside of multimap modes, he ''will'' be doing a guaranteed follow-up on your units, and with his Death Blow 4 and Lull Atk/Def, he ''will'' be punching dents on your tanks. His only weakness is his low Res and below average Spd.
* '''Sirius'''. He's a unit you don't want to fight by himself, having a great Atk/Spd line that's boosted further by his weapon and kit. Along with a Killer effect, his weapon gives him +4 Atk/Spd/Def/Res if by his lonesome, which is boost further by having Atk/Spd Solo 3. On top of all that, he has Lull Atk/Spd, meaning he'll boost his power and speed even further while preventing your units from having boosts in them 'and' strengthen his own, his devastating strength all topped off by having Luna which he will more than likely will use with his incredible Spd.
* '''Perceval'''. He stands out among other Lance Cavaliers by being a LightningBruiser instead of a GlassCannon or MightyGlacier, while also being surprisingly tanky. He has Atk/Def Solo, which gives him +6 Atk/Def if he's not adjacent to any allies during combat, Atk/Spd Lull, which inflicts -3 Atk/Spd on the opponent and negates any field buffs on those stats during combat, and Rouse Def/Res 3, which gives him +6 Def/Res if he's not adjacent to an ally at the start of his turn. The worst of all is his Prized Lance: it gives him -1 special cooldown, and if the opponent is at full HP, he gains +4 Atk/Spd/Def/Res during combat ''and'' inflicts -1 special buildup for the opponent.
* '''Fallen Male Corrin'''. This Infantry Dragon is just a few stats away from reaching Gen 4 ''Armored'' units, having incredible stats across the board. However, it's his entire skill kit that is the most worrying about him. His Brutal Breath gives him up to +5 Atk/Spd/Def/Res the less allies he has within 2 spaces of him, and inflicts -1 special cooldown to his foe if he has one or no allies within the same range, Atk/Spd Solo 4 to give him +7 Atk/Spd when he's alone, Rouse Spd/Def 3 to give him +6 Spd/Def at the start of his turn with the same activation conditions, and Null Follow-Up just to make things harder. Unlike his female counterpart, he is blue, but that also means that anyone not green or with dragon effective weapons will be dragon food to him if he's not handled properly.
* '''Gatrie''' is a MightyGlacier with one of the highest Def stats in ''Heroes'', and that means trouble if you're using primarily physical units, and that gets higher with his default Fortress Def/Res 3. Not only that, but he also has by default Crafty Fighter, which is a strong combination of Guard and Quick Riposte, as it allows him to have a guaranteed follow-up attack and decelerates the foe's special buildup if the foe initiates combat and he has 25% HP or more at the start of combat, and his Spirited Lance+ allows him to gain +4 Atk/Def and accelerates his special buildup if he has any bonus applied to him at the start of combat, such as the Hone and Rally skills. His only real weakness is his low Spd and average Res, as well as strong units with AntiArmor weapons, but the former is compensated by his Crafty Fighter, and his average Res is nothing to sneeze at.
* '''Duessel''' is another unit you don't want to fight by himself, as he is a MightyGlacier that has skills that will raise his defenses sky high, to the point that they can reach the ''50~60s'' range. Obsidian Lance gives him +3 Def and a guaranteed follow-up attack and inflicts -6 Atk/Def on the foe during combat if he's not adjacent to an ally, Bonfire, Def/Res Solo 4, Lull Atk/Def, and Rouse Def/Res 3. The only reasonable way to stop him is to target his lower Res, but even then that's nothing to sneeze at without any AntiCavalry magic weapons.

* '''Zeke''', while having a MightyGlacier statline, is more of a LightningBruiser with his Holy Gradivus not only having Distant Counter, but also grants him a guaranteed follow-up attack if he is at 25% HP or above at the start of combat. Bad enough on its own, but he also has Atk/Def Catch 4, which gives him +7 Atk/Def during combat if his foe is either at full HP or has a [Penalty] inflicted on them at the start of combat, and an additional +2 Atk/Def during combat if both conditions are met at the start of combat, and Def/Res Menace, where he will gain +6 Def/Res and inflict -6 Def/Res to the nearest foe if there is a foe within 4 spaces of him during combat, which helps him activate his Atk/Def Catch 4. Combined with his Bonfire and Atk/Def Lull and you got someone who is both difficult to take down and bait out without AntiCavalry magic weapons.

* '''Ophelia''' can be deadly if not dispatched quickly in most modes. Her Chill Res will make sure your designated Res tank gets debuffed, as Missiletainn's effect lets her turn her into a special nuke quickly enough. If she's grouped with other tome users, you'll fight one immediately with a special. The Special, Blazing Light, is an Area of Effect spell that damages the user based on her Atk minus her target's Def or Res. And Feh bless you if you have any units aligned to the target diagonally, as it'll damage those too. With this, she can easily finish off even bulky green units. If you thought you can abuse the damage before combat to cheese her with Vantage, think again, [[ComplacentGamingSyndrome because the most common build found in AR defense will run Hardy Bearing to prevent you from doing so]]. Thankfully her Special only activates during her phase, meaning you can attack her without her countering with one.

* '''Regular Sacred Stone Selena''' is somebody who you don't want to initiate on your units, as her GlassCannon statline is further bolstered with Life and Death 4, which alongside her Tome of Storms, which gives her +3 Spd, and if her foe is at 75% HP or above at the start of combat she gains +5 Atk/Spd during combat as well as negate any skill that deny any of her follow-up attacks as well as skills that guarantee the foe's follow-up attacks. She is also an annoying support unit, as she has Rally Atk/Res+ and Atk/Res Ruse to boost her ally and debuff her foes within cardinal directions of her and her ally she is Rallying, but this can get bad if her ally has a Rally skill to activate her Atk/Res Ruse. However, her GlassCannon statline means that her defenses are poor and therefore she will fall against anyone with a good Atk, but players need to be careful baiting her out first.

* '''Surtr''' is a menace from his sheer presence alone. He keeps Sinmara and comes with additional skills that make fighting him during either player phase or enemy phase tricky. Only the sturdiest units can stand a chance of surviving a debuff and attack from him, and otherwise there are few who can reliably one-round KO him. While Surtr is manageable if you're manually controlling everyone, if you're auto-battling he can spell a hasty end for your team. He was so disruptive that a later update specifically prevents him from appearing in certain modes, so you didn't have to build a team just to deal with him.

* '''Jill''' is a LightningBruiser you don't want to initiate on your units, as her Talregan Axe gives her +6 Atk/Spd during combat if she either initiates combat or is within 2 spaces of an ally, allows her to have any of her follow-up attacks go before the foe can counterattack, and since it gives -1 special cooldown, she's going to activate her Moonbow in order to make sure that one of your units will have a high chance of dying to her. Worse still is that she has the skill kit to exploit this, as she has Atk/Spd Push 4, Chill Atk/Spd, and Spd/Def Rein in order to maximize her chances to defeating one of your units unharmed. With that said, her low Res is her biggest weakness, so any magic uses can take her down easily, but they should be careful that she's not in their range.

* '''Fallen Female Morgan''', like Jill, is someone you should be careful with if she initiates combat, as her Axe of Despair will give her -1 maximum special cooldown and these effects if she is at 25% HP or above at the start of combat: inflict -6 Atk/Def on the foe during combat, and if the sum of the total field stat buffs she has and the total field stat debuff her target has is 5+ she will deny any of his foe's follow-up attacks, 10+ will guarantee her follow-up attack, and +15 she will inflict -1 special buildup on his foe during combat. That is bad enough, but she also packs Glimmer, Atk/Def Solo 4, Dive-Bomb, which allows her to have any of her follow-up attacks go before the foe can counterattack if she initiates combat and she and her foe are at 80% HP or above at the start of combat, and Atk/Def Menace, where at the start of her turn if a foe is within 4 spaces of her she inflicts -6 Atk/Def to the nearest foes and gives herself +6 Atk/Res, meaning that skill alone gives her a 24 stat swing, which is more than enough to active all the effects of her Axe of Despair. Coupled with her MightyGlacier statline and you got a threat that is difficult to bait out, approach, and possibly even take down.
* '''Regular Charlotte''', after spending 4 years as a bride, brings pain if she initiates combat. She bring a GlassCannon statline and has the skills to exploit this, with her having Glimmer, Swift Sparrow 3, Frenzy, which allows her to reduce damage taken from attacks and non-Røkkr AOE specials by 4% for each point of Spd she has over her foe, up to 40% damage reduced, and allows her to have any of her follow-up attacks go before the foe can counterattack if she initiates combat and is at 50% HP or below at the start of combat, and Time's Pulse. The worst of all is her Fair-Fury Axe, which give her -1 maximum special cooldown, and allows her to gain +6 Atk/Spd during combat and gain true damage equal to 15% of her Atk during combat if she either initiates combat or is within 2 spaces of an ally. With Time's Pulse getting her Glimmer ready at all times and her sky high Atk and Spd, any attacks from her would most likely result in a dead unit. Her only weakness is her low defenses, so strong attacks against her can take her down just fine, but with Frenzy's DamageReduction and her high HP you're most likely need more than one unit to take her down.
* '''Ascended Fjorm''' is a LightningBruiser Armored Axe unit that basically acts as a better version of her Regular variant pre-refine. Her Nifl's Axe gives her -1 maximum special cooldown, has Distant Counter, and if she is within 2 spaces of an ally, she restores 7 HP after combat and ignore skills that deny her counterattacks if the foe wields a ranged weapon. She also has her regular variant's Ice Mirror (but thankfully not Ice Mirror II), Steady Posture 3 and Hardy Fighter, which allows her to ignore skills that guarantee the foe's follow-up attacks gives her -2 special cooldown at the start of turn 1 if she is equipped with a defensive special, and if said defensive special reduces damage by a percentage, it triggers twice and reduces an additional 5 damage, which includes the reflected damage of Ice Mirror as well. Finally, she has A/R Far Save to exploit all of that to the fullest, meaning that she's a bane to all ranged units, especially Staff units who usually depend on preventing foe's counterattacks to mitigate their low Def. However, her player phase is lacking and can be taken down by strong melee units, but if a player deploys only ranged units, she easily becomes one of the worst units to go against if she's near any allies.

* '''Scattered Fangs Nino''' is an exceptional GlassCannon, boasting good Atk while having high Spd thanks to her weapon and skills. This is not enough, as her personal weapon Giga Excalibur gives her even more Spd while the unrefined version increasing her damage depending on how much faster she is than her enemy, up to a maximum of ''7 damage'', but that can be managed if she's attacking a fast unit. If refines are available for the enemy Nino, then the refined Giga Excalibur is even worse, as it allows her to gain true damage equal to 20% of her Spd, with no cap on that true damage, and the unique refine allows her to gain +4 Atk/Spd during combat if she's within 2 spaces of an ally, while also giving all allies within 2 spaces the same bonuses. Combined with her innate mobility as a flier, Nino can easily traverse the map and fire off devastatingly powerful attacks that will double quite often. Her power can be further bolstered with the usage of flier buffs - although, like her usual self, she's terrible at taking hits, especially now that her flier status gives her a crippling weakness to bow users.
* '''Regular Lewyn''' has average Atk and high Spd, but his power lies within his personal weapon, the tome Forseti. Not only does it give him +3 Spd, it gives him a sort of inverted Desperation effect: if he's above 50% HP, his follow-ups will always hit before his opponent's counterattack. And considering how fast he is, he's going to be doubling a lot. The ability to double his opponent before they can retaliate makes him an incredible threat that's able to dispatch most enemies before they even get the chance to retaliate. If refinable weapons are generated on enemy heroes, then his refined Forseti becomes worse to face against, with it now lowering the HP threshold to 25% or above, as well as giving him +4 Atk/Spd during combat if he initiates combat as well, and the unique refine further giving him +4 Atk/Spd, as well as ignoring any field stat debuffs on his Atk and Spd, as well as any field stat buffs on his opponent's Atk and Spd if the foe is at 75% HP or over at the start of combat. Combined with his default Swift Sparrow 2, he gains '''+12''' Atk/Spd if he initiates combat and everything is in his favor. And if that's not enough, he comes with Special Spiral, which gives him -2 special cooldown every time he ends a round of combat using his Special, allowing him to fire Glimmer off like a machine gun. Finally, he was released during Book II, so he was excluded from the purge of Book III units and beyond in Hall of Forms. However, like other mages, he still suffers from low defenses - while difficult, anything that can weather his attacks will usually defeat him in short order.

* '''Regular Shinon''' with his initial skill kit (in the Story Mode chapters alone assuming you're playing on Lunatic for Perfect Runs, you fight him ''3'' times) is a nightmare to deal with. Thought Midori was hell to deal with due to her access to Close Foil? This guy's weapon has Close Foil's advantages and then some built into it. Not only does it raise his Atk and De, it also raises his Spd and Res as well along with not having any weapon type or phase restrictions for it to activate, only position requirements. Additionally, it even speeds up his Special Cooldown, which, alongside Time's Pulse, charges him sooner for his skill Deadeye - which doubles the damage he deals with no way to reduce it outside of Specials like Aegis. His kit also contains Atk/Def Solo 4 and Lull Atk/Spd 3, which guarantees him to strike faster and harder than you if he's not adjacent with anyone. His only real weakness is that if he happens to be next to an ally, almost all of his advantages are shelved, but good luck if he happens to be the last foe on the map, or is otherwise spawned away from your other foes.

* '''Ascended Laegjarn''' is a LightningBruiser Colorless Bow Cavalier that you should be careful with, especially if she has buffs. She has Moonbow, Swift Sparrow 3, A/D Far Trace, and Rouse Atk/Spd 4, where she gains +6 Atk/Spd and the [Null Panic] status effect at the start of her turn if she's not adjacent to an ally, but what makes her a pain to deal with is her Flame of Múspell, which gives her -1 maximum special cooldown, deals effective damage against flying units, gives her +6 Atk/Spd during combat and Atk/Spd/Def/Res equal to 50% of the total sum of field stat buffs she and her foe has if she has a [Bonus] active on her, which includes [Null Panic], up to +12, and if the total is 10 or more she ignores skills that deny any of her follow-up attacks. So right from the get-go if Rouse Atk/Spd 4 activates she already gets +18 Atk/Spd and +6 Def/Res, which, in addition to her Swift Sparrow 3 and A/D Far Trace, that goes to +27 Atk, +26 Spd and +9 Def/Res, and that gets worse if there are addition buffs on her other stats and/or buffs on her foe as well, where in the worse case scenario she gets ''+33'' Atk, ''+32'' Spd, and +18 Def/Res. Her main weakness, however, is her poor Res, so any magic attacks on her, especially from AntiCavalry weapons, can take her down with ease, but one should still be careful baiting her out.

* '''Karla''' is comparable to the above Od members, with her base kit allowing her to tear through almost every unit that isn't built to counter her, thanks to her Vassal's Blade, Wrath and Even Spd Wave. [[OneWomanArmy If you're auto-battling, she can easily destroy your entire team.]] If refinable weapons are generated for enemy heroes, then she gets even worse as her Vassal's Blade, alongside the -1 max special cooldown, now gives her +5 Spd and deals damage equal to 15% of her Spd during combat if she either initiates combat or is within 2 spaces of an ally, and the unique refine has her gain +5 Atk/Spd during combat as well as Null Follow-Up if her foe is at 75% HP or above at the start of combat.

* '''Regular Nailah''', despite with her FragileSpeedster statline, can sometimes catch players by surprise with her skill kit, which includes Distant Counter, Null C-Disrupt, and Glare, which inflicts [Gravity] to her target and all foes adjacent to that target, alongside having Moonbow and her Wolf Queen Fang giving -1 maximum special cooldown, giving +2 Atk/Spd during combat for every ally within 2 spaces of her, up to +6, and allows her to deal +10 damage when her special triggers if she transforms.

* '''Wings of Fate Hinoka''' isn't too tough compared to other units, but for very specific teams, she's hell to deal with. Since she's a Bow unit, she already has a weapon super effective against fliers, and her Warrior Princess makes it effective against Armor units as well - along with giving her some extra Atk. Her high Res also makes her able to shrug off magic attacks. Her mobility's also great when it comes to fliers, as she has Flier Formation and Flier Guidance - meaning she can move a lot farther if she happens to be paired with other flying units. Also, January 2021 gave her weapon a refine (which is guaranteed to appear during higher levels of Forging Bonds and Hall of Forms), which allows her to lower the Atk, Def and Spd of any foes 3 spaces from her along with the preexisting Atk/Spd buff if she's close to an ally, guaranteeing her to hit fast and hit hard. Besides of the risk of running a flying or armor team, she's a ''hard counter'' to a couple of Hall of Forms teams (which tends to give you at least a Tome, Flying and/or Armor unit), especially the ''Sacred Stones'' themed one in late-June 2020 when you're given two Flying units and two Armor units. She was also released during Book II, so she's not affected by the purge that got rid of heroes from Book III onwards.

[[folder:In General]]
Several units and skills can greatly increase the difficulty of a map when present. Most notably, some of the tougher Grand Hero Battles and Bound Hero Battles utilize one or more of these.
* Enemies with Distant Counter, Close Counter, or any of the Close/Distant Foil/Ward skills, often built into their weapon. The player can often rely on ranged units to dispatch melee units and rely on melee units to dispatch ranged units without much retaliation. However, unless they can one-shot them, they will now have to face a counterattack, which can potentially be dangerous to the player's unit.
* Enemies with enhanced mobility skills. This includes skills like Wings of Mercy, Armor March, Flier Formation, Aerobatics, and Guidance. This can completely blindside the player as an enemy unit suddenly moves further ahead than they should to get the jump on one of the player's units.
** Some named enemy units (i.e. not the Emblian mooks) which don't even have such skills in their initial kits could end up having them anyways. This is especially shown in maps using [[https://feheroes.fandom.com/wiki/The_Silver_Knight Paralogue 10-3 (which the unit in Tana's position will almost always have Guidance)]] and [[https://feheroes.fandom.com/wiki/Family_of_Fangs Book II: Chapter 10-3 (which the unit in Nino's position will always have Aerobatics)]]. That Myrrh you're fighting could have Guidance and bring over a powerful unit to ruin your day on Tempest Trials or Hall of Forms if you don't look at her skill kit carefully.
* Enemies with Vantage, who will strike first if they are weakened. More often than not, this requires the player's units to one round their opposition, otherwise an opposing unit with Vantage would be able to strike first. This is an especially dangerous prospect if they have Distant Counter and/or a Special ready to unleash on their foes.
* Enemies with skills or weapons that prevent their enemies from counterattacking can make maps quite stressful. Units like Regular Faye or Roderick have Firesweep weapons, so the player cannot bait them out, which can potentially cost them time if they're encountered in the Tempest Trials. Regular Faye also has Wings of Mercy, which means she can blindside the player, while Roderick has Drag Back, pulling a player's unit away from formation. There are also the enemy Dazzling Staff users, who are very annoying to fight in the tougher Grand/Bound/Legendary/Mythic Hero Battles, especially since they can get free damage and status effects on the player's units in a mode where no units are allowed to die.
* Enemies with placement-affecting skills, especially Drag Back and Lunge. They're usually on maps with setups such that if your team can't defeat them in one round, they'll be repositioned into range of multiple other units and become open to a world of hurt.

* Thankfully Dancers don't have Emblan mook versions and can't be encountered at all in Tempest Trials (unless if the boss is a Dancer), Forging Bonds, Training Tower, or Hall of Forms, but you can still encounter them in some Bound Hero Battles (and even some Legendary ones), Story Mode, and Paralogue maps in the form of named units. They can proceed to make your day into a living hell by giving an enemy an extra chance to move, thus messing up your run. Reyson and Leanne are worse, as their range when they're in Flying Beast forms are the same as cavalry, meaning if they're with a Beast ally (which in their maps, they're always sorted as such), you're guaranteed a world of hurt if you don't take them or their allies out quickly. Needless to say, most maps that start off with an enemy Dancer don't require you to be in their attack range for them to dance another foe in order to reach and attack your units faster, making you think twice about that "Danger Zone" area.

* Enemies with the Near/Far Save skills, as they take the place of an ally within 2 spaces of them during combat if their foes are using a specific weapon range and initiate combat, meaning that they are treated as if they're adjacent to an ally (meaning that skills like the Bond skills will activate), take all after combat effects such as from the Staff weapons, and protect that ally from said after combat effects. Although limited to Armor units, that also means that units who initiate on them need to have a way to defeat those units in one round of combat, as they often have high defenses to make sure that they can survive long enough to activate the Save skills again and waste turns of the player's units, especially if they have Wary Fighter equipped.
* Enemies with the Fatal Smoke skill, where not only will they prevent their target from healing during and after combat, but they will inflict the [Deep Wounds] status effect to the target and all of their allies within 2 spaces of that target, which those affected with that status effect will not be able to recover HP during their entire turn, so LifeDrain and HealThyself skills will not work on these users. This becomes especially bad if said enemy also has a skill and/or special that have deals damage outside of combat, such as the AOE specials and Poison Strike just to make sure that they stay damaged for other enemies to finish them off and players to waste turns to remove [Deep Wounds] and heal their damaged units.

** '''Regular Mareeta'''. She's an infantry sword wielder who gets a ton of stats simply by being away from her allies. With her weapon and Atk/Spd Solo 3, she gets ''+10 Atk/Spd'', as well as +4 Def/Res during combat, and she'll also disable any skills that either guarantee your follow-up attacks or deny her follow-up attacks. In other words, you have to face her in a fair and square Spd check, which is no easy feat when her Spd is through the roof. Said Spd also helps her with her Close Call skill, which mitigates damage up to 40% depending on how much faster she is. Finally, she has Rouse Atk/Def to give her +6 Atk/Def at the start of her turn if she's not adjacent to an ally. In short, this essentially makes her much harder to defeat.

* '''Perceval'''. He stands out among other Lance Cavaliers by being a LightningBruiser instead of a GlassCannon or MightyGlacier, while also being surprisingly tanky. He has Atk/Def Solo, which gives him +6 Atk/Def if he's not adjacent to any allies during combat, Atk/Spd Lull, which inflicts -3 Atk/Spd on the opponent and negates any field buffs on those stats during combat, and Rouse Def/Res, which gives him +6 Def/Res if he's not adjacent to an ally at the start of his turn. The worst of all is his Prized Lance: it gives him -1 special cooldown, and if the opponent is at full HP, he gains +4 Atk/Spd/Def/Res during combat ''and'' inflicts -1 special buildup for the opponent.
* '''Fallen Male Corrin'''. This Infantry Dragon is just a few stats away from reaching Gen 4 ''Armored'' units, having incredible stats across the board. However, it's his entire skill kit that is the most worrying about him. His Brutal Breath gives him up to +5 Atk/Spd/Def/Res the less allies he has within 2 spaces of him, and inflicts -1 special cooldown to his foe if he has one or no allies within the same range, Atk/Spd Solo 4 to give him +7 Atk/Spd when he's alone, Rouse Spd/Def to give him +6 Spd/Def at the start of his turn with the same activation conditions, and Null Follow-Up just to make things harder. Unlike his female counterpart, he is blue, but that also means that anyone not green or with dragon effective weapons will be dragon food to him if he's not handled properly.

* '''Duessel''' is another unit you don't want to fight by himself, as he is a MightyGlacier that has skills that will raise his defenses sky high, to the point that they can reach the ''50~60s'' range. Obsidian Lance gives him +3 Def and a guaranteed follow-up attack and inflicts -6 Atk/Def on the foe during combat if he's not adjacent to an ally, Bonfire, Def/Res Solo 4, Lull Atk/Def, and Rouse Def/Res. The only reasonable way to stop him is to target his lower Res, but even then that's nothing to sneeze at without any AntiCavalry magic weapons.
* '''Regular Ingrid''' is basically a more powerful version of Roderick, as she has a GlassCannon statline, and has the skillkit to exploit it, with Lúin giving her -1 special cooldown, and if she either initiates combat or is within 2 spaces of an ally, she gains +6 Spd, deal damage equal to 20% of her Spd, and if she has 5 or more Spd higher than her foe during combat, she prevents their counterattacks. What's more, she also has Atk/Spd Solo 4, Lull Spd/Def and Rouse Atk/Spd in order to make sure that her Spd reaches high enough and lower her foe's Spd enough to make sure that she prevents her foe from counterattacking, and finally Moonbow to pierce through her foe's defenses. Because she is still a GlassCannon, players can easily take her down, but they otherwise have to be careful not to allow her to initiate combat.

* '''Regular Edelgard''', effectively an Axe Armor disguised as an infantry unit. Her Victorious Axe is like Ephraim's Flame Siegmund - in addition to accelerating her Special trigger, she'll make a guaranteed follow-up if she is surrounded by more enemies than allies. This makes her offensive speed weakness moot, letting her tear chunks out of just about any enemy while firing off specials. The rest of her kit synergizes extremely well with her weapon: Atk/Def Solo 3 further powers up her offensive and defensive abilities when alone, while Rouse Atk/Def ''further'' boosts her if she starts combat without an adjacent teammate. While her skillset deprives her of valuable team support, she is more than capable of handling foes on her own - if all her abilities trigger at once, there are almost no physical units capable of fighting her and surviving. Her only real weakness is her low Res and average HP and Spd.

* '''Regular Charlotte''', after spending 4 years as a bride, bring pain if she initiates combat. She bring a GlassCannon statline and has the skills to exploit this, with her having Glimmer, Swift Sparrow 3, Frenzy, which allows her to reduce damage taken from attacks and non-Røkkr AOE specials by 4% for each point of Spd she has over her foe, up to 40% damage reduced, and allows her to have any of her follow-up attacks go before the foe can counterattack if she initiates combat and is at 50% HP or below at the start of combat, and Time's Pulse. The worst of all is her Fair-Fury Axe, which give her -1 maximum special cooldown, and allows her to gain +6 Atk/Spd during combat and gain true damage equal to 15% of her Atk during combat if she either initiates combat or is within 2 spaces of an ally. With Time's Pulse getting her Glimmer ready at all times and her sky high Atk and Spd, any attacks from her would most likely result in a dead unit. Her only weakness is her low defenses, so strong attacks against her can take her down just fine, but with Frenzy's DamageReduction and her high HP you're most likely need more than one unit to take her down.

* '''Regular Shamir''', normally a GlassCannon, is someone you shouldn't leave alone. A Green Infantry Bow, her Survivalist Bow gives her -1 special cooldown, and she gains +6 Atk/Spd during combat and if the foe is at 80% HP or above at the start of combat she prevents enemy counterattacks, if she is not adjacent to an ally. She also has Moonbow, Atk/Spd Solo 4, Null Follow-Up, and Rouse Atk/Spd, making her more stronger if she's not next to an ally and is guaranteed to deal serious damage if you let her initiate combat. However, because she has high offenses but low defenses, she can easily be taken down by any strong attacks, especially if they're red, but you still need to be careful trying to get her into range of those units.

* '''Igrene''' brings a very strong kit, and a GlassCannon to go along with it. Her Guardian's Bow has -1 special cooldown and inflicts -5 Atk/Spd/Def on the foe if she's faster than them, but the worst of all is the rest of the skills. She has Blazing Wind, the best out of all the AOE specials in the game, Special Spiral, which gives her -2 special cooldown if she activated her special before or during combat, Pulse Smoke, which inflicts +1 special cooldown to the target and all foes within 2 spaces of the target up to their max special cooldown count, and Life and Death 4. However, since she is still a GlassCannon with her low defenses with everything equipped, any strong attackers will take her down in one round.

* '''Shamir''', normally a GlassCannon, is someone you shouldn't leave alone. A Green Infantry Bow, her Survivalist Bow gives her -1 special cooldown, and she gains +6 Atk/Spd during combat and if the foe is at 80% HP or above at the start of combat she prevents enemy counterattacks, if she is not adjacent to an ally. She also has Moonbow, Atk/Spd Solo 4, Null Follow-Up, and Rouse Atk/Spd, making her more stronger if she's not next to an ally and is guaranteed to deal serious damage if you let her initiate combat. However, because she has high offenses but low defenses, she can easily be taken down by any strong attacks, especially if they're red, but you still need to be careful trying to get her into range of those units.

* '''Shinon''' with his initial skill kit (in the Story Mode chapters alone assuming you're playing on Lunatic for Perfect Runs, you fight him ''3'' times) is a nightmare to deal with. Thought Midori was hell to deal with due to her access to Close Foil? This guy's weapon has Close Foil's advantages and then some built into it. Not only does it raise his Atk and De, it also raises his Spd and Res as well along with not having any weapon type or phase restrictions for it to activate, only position requirements. Additionally, it even speeds up his Special Cooldown, which, alongside Time's Pulse, charges him sooner for his skill Deadeye - which doubles the damage he deals with no way to reduce it outside of Specials like Aegis. His kit also contains Atk/Def Solo 4 and Lull Atk/Spd 3, which guarantees him to strike faster and harder than you if he's not adjacent with anyone. His only real weakness is that if he happens to be next to an ally, almost all of his advantages are shelved, but good luck if he happens to be the last foe on the map, or is otherwise spawned away from your other foes.

** '''Larcei''' is basically another version of her mother Ayra, and that mean trouble. She has Atk/Spd Solo 3 to boost her Atk/Spd if she's not adjacent to an ally, Repel to both push one of your units back after she initiates combat while also making use of her high Spd to reduce damage, and Panic Smoke just to make sure that any bonuses on your heroes will be penalties instead. Her weapon Larcei's Edge reduces her cooldown by 1 and give her +4 Atk/Spd/Def/Res and ignore any bonuses on her foes if either she has higher Spd than her foe at the start of combat or her foe is a full HP at the start of combat.

* '''Lewyn''' has average Atk and high Spd, but his power lies within his personal weapon, the tome Forseti. Not only does it give him +3 Spd, it gives him a sort of inverted Desperation effect: if he's above 50% HP, his follow-ups will always hit before his opponent's counterattack. And considering how fast he is, he's going to be doubling a lot. The ability to double his opponent before they can retaliate makes him an incredible threat that's able to dispatch most enemies before they even get the chance to retaliate. If refinable weapons are generated on enemy heroes, then his refined Forseti becomes worse to face against, with it now lowering the HP threshold to 25% or above, as well as giving him +4 Atk/Spd during combat if he initiates combat as well, and the unique refine further giving him +4 Atk/Spd, as well as ignoring any field stat debuffs on his Atk and Spd, as well as any field stat buffs on his opponent's Atk and Spd if the foe is at 75% HP or over at the start of combat. Combined with his default Swift Sparrow 2, he gains '''+12''' Atk/Spd if he initiates combat and everything is in his favor. And if that's not enough, he comes with Special Spiral, which gives him -2 special cooldown every time he ends a round of combat using his Special, allowing him to fire Glimmer off like a machine gun. Finally, he was released during Book II, so he was excluded from the purge of Book III units and beyond in Hall of Forms. However, like other mages, he still suffers from low defenses - while difficult, anything that can weather his attacks will usually defeat him in short order.