Fallen Robin (M)

I actually got a +atk -hp Fallen Robin which is awesome. There are 2 roles I'd like him to play on a dragon team: the first is to keep up with the other dragons, hence Armored Boots seal, and the second is to be extremely dangerous to fight all the time, hence Steady Breath when baiting with Bold Fighter on player phase. Aether is great to have in order to possibly keep Armored Boots activated, and having a healer with Fallen Robin will help greatly to keep Armored Boots effect going after he faced an enemy. He's highly versatile as a unit who I don't want to face a +10 version of for sure.

I have this Enemy Phase build set on my Neutral IV Grima, though the +Atk boon -HP bane works ideally. Calling this build 'Come at me bro', for obvious reasons. Grima is already a massive tank, and one that can match up against most meta units. Usually people are running armor builds in arena and tempest trials, and I know running into a Micaiah is everyone's worst fear unless you make a unit strictly to beat her. This build doubles as an anti-Micaiah build, running Svalinn Shield to get rid of Thani, Wing Sword, and anti-armor weapons. Been a lifesaver on many instances, as I originally ran Brazen Atk/Def3 or Brazen Def/Res3 if you already have a solution to Anti-armor units. Vengeful Fighter 3 is perfect for charging up Aether and healing yourself right back up to stay above 50% health, but Ignis will work well too if on budget. I like using Armor March 3, as I have him paired up with Hardin(with Ward Armor) for ally support, which boosts his stats even further. That being said, C slot is flexible as it can suit your needs in case you want to use Armored Boots for an S slot, though it does take away your S slot option for a better seal. For S slot I choose Distant Def3, to make him even tankier, though you can use an attack priority seal or CloseDef3 to have a similar effect to make his EnemyPhase even stronger.

Normally I have the worst luck with summons, so I tried to keep my build within... attainable skill reach? I'll keep this brief, since most of the skills I've chosen have been continuously explained prior to this.

Fury/Life and Death:
So I am currently on the border with these two. Given how my Grima/Robin is, he has a High Res and a Low Speed, so I'd try to figure out how to fiddle my way around this. Fury raises both spots, allowing his speed to reach the Average amount while raising everything else and have a 6 dmg. kickback to it. Life and Death would be able to raise his (already monstrous) Attack and lacking Speed while lowering Defense. Both have their goods and bad's, so it depends. I lean towards Fury, however, since every stat is actually raised and the damage taken from it may not be too worrisome, provided that if he was to be attacked, his heightened Def. and Res. can protect him. I am going off of assumptions, though.

Savage Blow:
With how Grima Robin is capable of attacking from any distance, this allows him to whittle away at enemies for the rest of the team to strike.

Threaten Speed:
It may be futile to use this, but given that I am trying to balance him out or something along those lines, I thought that by pairing this with either Fury or Life and Death, he would be able to turn the tables on a few enemies. I am unsure if this will work, but for now, I am keeping it.

On a side note: At the moment, I do have him on a team with Winter Robin (with his Armor March 3), LA Eliwood (With his Goad Armor), and a Gravity/Physic+ Genny, and so far things are working out pretty well... strangely enough. At least, I believe so!

I'm sure I'm not the first to say it, but an armored dragon is a unique and cool thing, and Grima's massive attack is the icing on the cake. Not NAMING him Grima or using the Female Robin like they've done everywhere else feels like missed opportunities, though...

Expiration: There is simply no substitute for this weapon. It's a mix of Great Flame minus the Atk boost (which Grima doesn't really need) and Lightning Breath+ without the charge drawback. Anything two spaces away is going to get rocked by Grima's sky-high Atk stat, and built-in Distant Counter means units are 1 range aren't safe either. Simply pick an enemy that can't retaliate or can't hit back very hard, and watch Grima rip apart his newest victim.

Pivot / Swap: As an armored unit, Grima can't move very far on his own. This allows him to jump around with his ally units to get around the map, sometimes to places you'd never expect (especially if partnered with a flier!).

Aether: While not as devastating as the default Bonfire or unlockable Ignis, Aether's defense drop should not be underestimated; this combined with Grima's incredible Atk is still enough to oneshot almost every unit in the game. 75% of that damage is a full heal in most cases, keeping Grima healthy and his HP-reliant skills available.

Steady Breath: While Warding Breath seems like the logical choice to patch up Grima's Res, ranged units are going to suffer the full wrath of Expiration, so melee enemies targeting Def are a more pressing threat. The real reason for using a Breath skill, however, is the faster cooldown charge during the enemy's turn, making Aether as spammable as possible (usable every 4 attacks as opposed to 6).

Bold Fighter 3: The opposite of the default Vengeful Fighter, Bold Fighter gives Grima a guaranteed follow-up attack when he initiates combat instead of the other way around, letting him double without worrying about Spd. The cooldown reduction from each attack is also great.

Threaten Atk 3: Any enemy within two spaces of Grima suffers -5 Atk, increasing his own tankiness. This is also helpful to allies since Grima will always be around them to abuse Pivot/Swap, reducing the damage they take if the enemy has to go adjacent to them.

Quick Riposte 3: This skill allowing double-attacks on enemy phases regardless of Spd, combined with Steady Breath giving cooldown charge, essentially creates a Vengeful Fighter 3 with a Def bonus.

The combination of Bold Fighter 3, pseudo-Vengeful Fighter 3 and Expiration lets Grima double-attack and accelerate his Aether charge off of any enemy during both phases, so ideally every fourth attack will destroy the target and heal him back to full, letting him continue spamming the Fighter skills; rinse and repeat until all enemies are destroyed. And while the combo of Steady Breath and Threaten Atk 3 won't be enough to stop a well-built Falchion-user, if can still give Grima some surprising bulk against Red units not wielding anti-Dragon or anti-Armor weaponry.

This build aims to capitalize on FH Robin's immense attack and respectable physical bulk, while also patching up his resistance.

With this set, FH Robin will gain 41 defense and 33 resistance whenever he is attacked, making him extremely tough to kill. Paired with his obscene base attack, Expiration's ability to target the lower defensive stat of ranged units, and Vengeful Fighter's built-in Quick Riposte, he becomes an almost unstoppable force of destruction, able to effectively kill most everything, including some TA Red units.

Aether just becomes icing on the cake at this point, as FH Robin will rarely, if ever, fall below the 50% HP threshold required for Vengeful Fighter, but if he does, then Aether will recover an incredible amount of HP and bring him back to almost full health.

P.S: the seal and a slot skill are obviously interchangeable.