This is a guide on the best free units to spend Heroic Grails on in Fire Emblem Heroes (FEH). To know which units are the best to invest in and which to use for skill inheritance, read on!

Best Units to Spend Heroic Grails On Quick Reference Table

Best Units to Merge and Build

Aversa	Yen'fay	Iago	Itsuki
Kempf	Black Knight	Arden	Naesala
Brunnya	Masquerade Eldigan	Petrine	Riev
Azura (Young)	Young Minerva	Ninja Shamir	Kronya
Valentine's Silque	Young Innes	Summer Leonie	Winter Ignatz

Best Units for Skill Inheritance

Garon	Joshua	Spring Bartre	Masquerade Eldigan
Groom Hinata	Darros	Ninja Hana	Hostile Springs Camilla
Gangrel

Best Units to Spend Heroic Grails On to Merge and Build

Infantry Units

Iago

Red		Red Tome		Infantry
Base Stats
Lv. 1	HP 18	Atk 24	Spd 5	Def 6	Res 11
Lv. 40	HP 46 (42)	Atk 54 (38)	Spd 27 (27)	Def 23 (23)	Res 35 (32)
Default Skills
： Iago's Tome ：- ： Blazing Wind			： HP/Atk 2 ：- ： Atk Opening 3 ：-

Iago Builds and Best IVs

Iago's kit possesses powerful debuffs that checks for all enemy units on the map. He's very useful in Aether Raids defense due to this.

Though he is outclassed by Aversa, he's still a unit worth investing in.

Itsuki

Red		Sword		Infantry
Base Stats
Lv. 1	HP 19	Atk 25	Spd 8	Def 10	Res 8
Lv. 40	HP 41 (41)	Atk 53 (37)	Spd 30 (30)	Def 36 (33)	Res 32 (32)
Default Skills
： Mirage Falchion ： Swap ： Sol			：- ： Atk/Def Link 3 ： Drive Def 2 ：-

Itsuki Builds and Best IVs

Itsuki is a unit with good stats if built properly. He also possesses a dragon-effective weapon, and his BST is actually decent for a free infantry unit (totaling to 173).

He's a unit recommended to be built and merged for the Arena.

Yen'fay

Red		Sword		Infantry
Base Stats
Lv. 1	HP 19	Atk 25	Spd 15	Def 8	Res 6
Lv. 40	HP 43 (43)	Atk 53 (37)	Spd 45 (42)	Def 32 (32)	Res 28 (28)
Default Skills
： Carnage Amatsu ：- ： Astra			： Kestrel Stance 2 ：- ： Threat. Atk/Def 2 ：-

Yen'fay Builds and Best IVs

Yen'fay possesses a powerful weapon that can retaliate at any distance and provide Spd-based damage reduction.

With his BST and stat spread, he's a great unit to use in Arena as a merge project.

Brunnya

Blue		Blue Tome		Infantry
Base Stats
Lv. 1	HP 18	Atk 23	Spd 7	Def 7	Res 12
Lv. 40	HP 42 (42)	Atk 49 (35)	Spd 31 (31)	Def 21 (21)	Res 36 (33)
Default Skills
： Fimbulvetr ：- ： Glacies			： Death Blow 3 ：- ： Res Smoke 3 ：-

Brunnya Builds and Best IVs

Brunnya's weapon gives her the ability to neutralize any debuffs on her and due to her high Res, can act as a magic tank.

She can be used for both Arena and Aether Raids due to the number of magic users being dispatched in both game modes.

Riev

Blue		Blue Tome		Infantry
Base Stats
Lv. 1	HP 19	Atk 25	Spd 6	Def 4	Res 10
Lv. 40	HP 43 (43)	Atk 53 (39)	Spd 25 (25)	Def 23 (23)	Res 40 (40)
Default Skills
： Argent Aura ：- ： Glacies			： Atk/Res Ideal 3 ：- ： Savage Blow 3 ：-

Riev Builds and Best IVs

Riev is a strong support unit that can apply powerful debuffs from any distance.

He can also function as the team's magic tank with his high Res stat.

Ninja Shamir

Green		Axe		Infantry
Base Stats
Lv. 1	HP 18	Atk 9	Spd 10	Def 5	Res 4
Lv. 40	HP 42 (42)	Atk 46 (37)	Spd 40 (40)	Def 27 (31)	Res 28 (32)
Default Skills
： Shuriken Cleaver+ ：- ： Glimmer			： Atk/Spd 2 ：- ： Atk/Spd Oath 3 ：-

Ninja Shamir Builds and Best IVs

Ninja Shamir makes a great speedy axe infantry unit that functions well with both offensive and defensive builds.

With a high enough BST to be viable in Arena, she makes for a great merge project in most game modes.

Kronya

Colorless		Dagger		Infantry
Base Stats
Lv. 1	HP 18	Atk 23	Spd 11	Def 5	Res 7
Lv. 40	HP 44 (44)	Atk 45 (31)	Spd 39 (39)	Def 22 (22)	Res 29 (26)
Default Skills
： Athame ：- ： Luna			：- ： Desperation 3 ： Distant Guard 3 ：-

Kronya Builds and Best IVs

Kronya is a very strong unit common in Aether Raids.

Her weapon gives her a Vantage ability. Combined with Close Counter and the Bolt Tower structure, she will be very difficult to defeat.

Young Innes

Colorless		Bow		Infantry
Base Stats
Lv. 1	HP 19	Atk 25	Spd 8	Def 7	Res 5
Lv. 40	HP 43 (43)	Atk 51 (37)	Spd 38 (38)	Def 26 (26)	Res 27 (27)
Default Skills
： Bow of Frelia ：- ： Glimmer			： Swift Sparrow 2 ：- ： Distant Guard 3 ：-

Young Innes Builds and Best IVs

Young Innes possesses an exclusive weapon that pierces through damage reduction effects, negating the need for Deadeye.

He also has a very competitive stat spread making him a great offensive unit in multiple game modes.

Flying Units

Young Minerva

Green		Axe		Flying
Base Stats
Lv. 1	HP 18	Atk 27	Spd 12	Def 14	Res 4
Lv. 40	HP 40 (40)	Atk 55 (36)	Spd 40 (37)	Def 38 (35)	Res 19 (19)
Default Skills
： Dragoon Axe ：- ： Draconic Aura			： Dragoon Shield ： Flier Formation 3 ：- ：-

Young Minerva Builds and Best IVs

Young Minerva comes with a weapon that accelerates her Special trigger and grants her access to buffs, while also possessing an A skill that renders effective against flying weapons useless against her.

Because of these Prf skills, she scores higher in Arena than other Axe units like Camilla or Cherche.

Naesala

Blue		Blue Beast		Flying
Base Stats
Lv. 1	HP 17	Atk 22	Spd 13	Def 5	Res 7
Lv. 40	HP 39 (39)	Atk 46 (32)	Spd 41 (38)	Def 24 (24)	Res 29 (29)
Default Skills
： Raven King Beak ：- ： Blazing Wind			： Swift Sparrow 2 ： Guard 3 ：- ：-

Naesala Builds and Best IVs

Naesala is a beast unit, and as such, can move 3 spaces when he transforms.

His high speed makes him formidable, especially when merged and built, and is a good addition to an all-beast team.

Aversa

Red		Red Tome		Flying
Base Stats
Lv. 1	HP 18	Atk 21	Spd 8	Def 4	Res 10
Lv. 40	HP 46 (42)	Atk 47 (33)	Spd 36 (34)	Def 17 (17)	Res 27 (24)
Default Skills
： Aversa's Night ：- ： Dragon Fang			： HP/Spd 2 ：- ： Odd Res Wave 3 ：-

Aversa Builds and Best IVs

Like Iago, Aversa's weapon checks for all enemy units present on the map.

Her debuff is extremely powerful against teams that rely on being adjacent to each other, and is a good unit for both Arena and Aether Raids defense.

Cavalry Units

Kempf

Red		Sword		Cavalry
Base Stats
Lv. 1	HP 18	Atk 23	Spd 7	Def 11	Res 7
Lv. 40	HP 42 (42)	Atk 45 (33)	Spd 33 (33)	Def 30 (27)	Res 31 (26)
Default Skills
： Venin Edge ：- ： Aegis			： Fortress Res 3 ：- ： Savage Blow 3 ：-

Kempf Builds and Best IVs

Kempf's weapon is very powerful - dealing damage to his target and nearby enemy units, while also rendering them unable to perform counterattacks through their next actions.

Having that weapon makes him a good candidate for a game mode like Pawns of Loki.

Petrine

Blue		Lance		Cavalry
Base Stats
Lv. 1	HP 18	Atk 25	Spd 12	Def 8	Res 5
Lv. 40	HP 42 (42)	Atk 51 (35)	Spd 40 (37)	Def 30 (30)	Res 24 (24)
Default Skills
： Flame Lance ：- ： Ignis			： Atk/Spd Push 3 ：- ： Threat. Atk/Def 2 ：-

Petrine Builds and Best IVs

Petrine has a lot of Spd and as such, can double a lot of units to take them out.

Her weapon is effective on beast units and it also calculates damage based on her target's Res instead of their Def if her HP is ≥ 50%. She will also debuff her target if those conditions are met.

She'll find herself at home in all cavalry teams, where she gains access to cavalry buffs to bump up her firepower even more.

Summer Leonie

Colorless		Bow		Cavalry
Base Stats
Lv. 1	HP 41	Atk 48	Spd 39	Def 27	Res 19
Lv. 40	HP 41 (41)	Atk 48 (36)	Spd 39 (39)	Def 27 (27)	Res 19 (19)
Default Skills
： Sunflower Bow+ ： Reposition ：-			： Atk/Spd Push 3 ： Spd/Def Link 3 ：- ：-

Summer Leonie Builds and Best IVs

Summer Leonie is a speedy bow cavalry unit that works well in Aether Raids defense teams.

With her large threat range and formidable stat spread, she can pick off enemies from turn one with various bow options to choose from.

Armored Units

The Black Knight

Red		Sword		Armored
Base Stats
Lv. 1	HP 22	Atk 26	Spd 8	Def 9	Res 5
Lv. 40	HP 48 (48)	Atk 50 (34)	Spd 34 (34)	Def 35 (35)	Res 18 (18)
Default Skills
： Alondite ：- ： Black Luna			： Steady Stance 3 ： Wings of Mercy 3 ：- ：-

Black Knight Builds and Best IVs

The Black Knight's weapon allows him to counterattack regardless of range and his Special is extremely powerful even against the beefiest units.

He fits in in a wide variety of teams and maps, so he's worth investing in if you're looking for a versatile armored unit.

Arden

Red		Sword		Armored
Base Stats
Lv. 1	HP 25	Atk 18	Spd 0	Def 13	Res 3
Lv. 40	HP 60 (60)	Atk 44 (36)	Spd 11 (16)	Def 41 (41)	Res 16 (16)
Default Skills
： Arden's Blade ：- ： Pavise			：- ： Follow-Up Ring ： Drive Def 2 ：-

Arden Builds and Best IVs

Arden's fully min-maxed statline makes him one of the best Near Save units in the game.

With the ability to launch a huge Ignis in every combat, his damage potential cannot be underestimated.

Winter Ignatz

Colorless		Bow		Armored
Base Stats
Lv. 1	HP 20	Atk 19	Spd 12	Def 7	Res 9
Lv. 40	HP 42 (42)	Atk 47 (35)	Spd 40 (40)	Def 31 (31)	Res 37 (37)
Default Skills
： Tannenbow+ ： Rally Atk/Spd ：-			： Spd/Def Form 3 ：- ： Def Tactic 3 ：-

Winter Ignatz Builds and Best IVs

Winter Ignatz is a valuable armor unit to inherit Far Save skills onto.

With his defensive stat spread and ability to use bows, he can absorb hits and retaliate with physical damage against ranged foes.

Dancer Units

Masquerade Eldigan

Blue		Lance		Flying
Base Stats
Lv. 1	HP 17	Atk 22	Spd 4	Def 9	Res 5
Lv. 40	HP 43 (43)	Atk 52 (38)	Spd 26 (26)	Def 37 (37)	Res 18 (18)
Default Skills
： Courtly Candle+ ： Dance ：-			：- ： Caldera Dance 2 ： Def Opening 3 ：-

Masquerade Eldigan Builds and Best IVs

Masquerade Eldigan is an excellent support dancer, mainly used in Aether Raids due to his massive Def stat.

This makes him useful as a counter to Mila, who targets her foe's Def for her debuff.

Young Azura

Green		Green Tome		Infantry
Base Stats
Lv. 1	HP 14	Atk 21	Spd 8	Def 4	Res 6
Lv. 40	HP 36 (36)	Atk 47 (33)	Spd 32 (29)	Def 17 (17)	Res 25 (25)
Default Skills
： Book of Shadows ： Sing ：-			： Spd/Res Bond 3 ： Torrent Dance 3 ：- ：-

Azura (Young) Builds and Best IVs

Azura's younger version of herself can also function as an offensive unit aside from being a dancer.

She's the only green tome dancer that is currently free to obtain, so if you have need of such a unit, it's worth investing in her.

Staff Units

Valentine's Silque

Colorless		Staff		Cavalry
Base Stats
Lv. 1	HP 16	Atk 21	Spd 3	Def 8	Res 7
Lv. 40	HP 40 (40)	Atk 40 (28)	Spd 22 (22)	Def 32 (32)	Res 29 (29)
Default Skills
： Rapport Wand+ ： Martyr+ ： Heavenly Light			：- ： Live to Serve 3 ： Spd Opening 3 ：-

Valentine's Silque Builds and Best IVs

Silque comes with a weapon she can use to buff her own allies as well as a C skill that buffs that unit with the most Spd on her team.

This can greatest increase the power of any Spd-based units and she can quickly get to her allies to heal them due to her nature of being a cavalry healer.

However, if you have other Staff units like Brave Camilla or Veronica, you can use them instead of Silque.

Get Your Favorite Unit

If you have a unit you really like, we recommend spending your Grails on them since they are easy to obtain and build.

Since exchanging Heroic Grails adds the units one by one into your barracks, you can save your Grails until a unit you like is added.

Best Units to Spend Heroic Grails On for Skill Inheritance

Ninja Hana

Green		Axe		Infantry
Base Stats
Lv. 1	HP 18	Atk 17	Spd 14	Def 5	Res 4
Lv. 40	HP 42 (42)	Atk 50 (36)	Spd 49 (40)	Def 19 (28)	Res 21 (30)
Default Skills
： Ninja Masakari+ ：- ： Glimmer			： Life and Death 3 ： Wrath 3 ：- ：-

Ninja Hana Builds and Best IVs

Ninja Hana comes with a weapon that allows a unit to attack twice and grants +4 Spd, so you can fodder her off to one of your fast Axe units to increase their firepower.

Masquerade Eldigan

Blue		Lance		Flying
Base Stats
Lv. 1	HP 17	Atk 22	Spd 4	Def 9	Res 5
Lv. 40	HP 43 (43)	Atk 52 (38)	Spd 26 (26)	Def 37 (37)	Res 18 (18)
Default Skills
： Courtly Candle+ ： Dance ：-			：- ： Caldera Dance 2 ： Def Opening 3 ：-

Masquerade Eldigan Builds and Best IVs

Masquerade Eldigan's weapon not only grants buffs to his Atk and Def, but also reduces damage from his foe if they are able to perform a follow-up attack.

You can fodder him off and give his weapon to a tanky lance unit of your choice.

Darros

Green		Axe		Infantry
Base Stats
Lv. 1	HP 20	Atk 24	Spd 6	Def 9	Res 6
Lv. 40	HP 46 (46)	Atk 50 (36)	Spd 32 (32)	Def 37 (37)	Res 21 (21)
Default Skills
： Deck Swabber+ ： Shove ：-			： Earth Boost 3 ：- ： Odd Def Wave 3 ：-

Darros Builds and Best IVs

Darros' weapon neutralizes any bonuses to their Atk and Def and debuffs those same stats if he is not adjacent to an ally.

You can fodder his weapon off to one of your axe units to give them a big boost. One of Ninja Hana's best builds actually makes use of this weapon!

Groom Hinata

Green		Axe		Infantry
Base Stats
Lv. 1	HP 19	Atk 23	Spd 5	Def 12	Res 6
Lv. 40	HP 47 (47)	Atk 51 (37)	Spd 27 (27)	Def 40 (40)	Res 21 (21)
Default Skills
： Huge Fan+ ： Reciprocal Aid ：-			： Atk/Def Bond 3 ：- ： Close Guard 3 ：-

Groom Hinata Builds and Best IVs

Hinata's weapon grants Special cooldown charge +1 per his foe's attack as well as buffing his Atk and Def if he has any other buffs on him.

This is a good weapon to give to a tanky axe unit that can take physical damage.

Spring Bartre

Red		Sword		Infantry
Base Stats
Lv. 1	HP 20	Atk 24	Spd 4	Def 11	Res 6
Lv. 40	HP 46 (46)	Atk 54 (40)	Spd 26 (26)	Def 35 (35)	Res 25 (25)
Default Skills
： Carrot Cudgel+ ：- ： Smite			： Obstruct 3 ： Odd Atk Wave 3 ：- ：-

Spring Bartre Builds and Best IVs

Bartre's weapon gives buffs to his Atk and Def and neutralizes any debuffs to those same stats during combat if he is within 2 spaces of an ally.

This is a good weapon to give to a tanky sword unit that can take physical damage.

Joshua

Red		Sword		Infantry
Base Stats
Lv. 1	HP 18	Atk 23	Spd 9	Def 8	Res 11
Lv. 40	HP 40 (40)	Atk 47 (31)	Spd 35 (35)	Def 30 (30)	Res 33 (28)
Default Skills
： Audhulma ：- ： Moonbow			： Close Def 3 ： Windsweep 3 ：- ：-

Joshua Builds and Best IVs

Joshua can be foddered off for Windsweep 3, being one of the few very units that have the skill readily available.

He also possesses Close Def 3 at 5★, which you can give to any tanky unit expected to take physical damage.

Garon and Gangrel

Red		Red Breath		Infantry
Base Stats
Lv. 1	HP 17	Atk 25	Spd 5	Def 9	Res 8
Lv. 40	HP 43 (43)	Atk 49 (33)	Spd 22 (22)	Def 33 (33)	Res 32 (32)
Default Skills
： Breath of Blight ：- ： Dragon Fang			： Distant Def 3 ：- ： Panic Ploy 3 ：-

Garon Builds and Best IVs

Colorless		Dagger		Infantry
Base Stats
Lv. 1	HP 19	Atk 20	Spd 10	Def 5	Res 11
Lv. 40	HP 45 (45)	Atk 46 (32)	Spd 38 (38)	Def 24 (24)	Res 30 (27)
Default Skills
： Levin Dagger ：- ： Glacies			：- ： Chill Atk 3 ： Panic Ploy 3 ：-

Gangrel Builds and Best IVs

Both Garon and Gangrel can be foddered for Panic Ploy 3, which debuffs enemy units if the unit possessing the skill's HP is higher, so giving it to your unit with the highest HP is ideal.

Gangrel can also be foddered off for Chill Atk 3 and Garon can be foddered for Distant Def 3.

Hostile Springs Camilla

Colorless		Dagger		Flying
Base Stats
Lv. 1	HP 16	Atk 21	Spd 9	Def 4	Res 6
Lv. 40	HP 38 (38)	Atk 45 (33)	Spd 35 (35)	Def 17 (17)	Res 28 (28)
Default Skills
： Ouch Pouch+ ：- ： Glimmer			： Atk/Spd 2 ：- ： Hone Fliers ：-

Hostile Springs Camilla Builds and Best IVs

Camilla comes with Hone Fliers, a useful skill to give if you're planning to make an all-flier team, which is quite a popular team to see in Aether Raids and Arena.

Related Links

Useful Links

Useful Information and Guides

Building Units

Building Your Heroes
Level Grinding | How to Level Up Fast	How to Gain SP Quickly
How to Use Inherit Skill	Merge Allies Guide
Heroes You Should Unlock Potential For	Which Heroes Should You Send Home?
When Should You Unlock Potential?	How to Use the Training Tower
Trait Fruits: How to Change IVs	How to use Dragonflowers
How to Get Divine Codes	How to Grind Summoner Support
How to Increase Ally Support	General Tips for Building Units

Building Specific Roles

Hero Roles
Heroes with Refresher Skills	List of Staff Users
Physical Wall Heroes (Tanks)	Magic Wall Heroes (Res Tanks)

Beginner Guides

Beginner Guides
Five Things to Know Before Starting	Reroll Tier List
Hero Building	Beginner's Guide
List of All Skills	How to Get Free Orbs
My Summoner Guide	Should I Merge or Fodder Off Units?

Arena

Arena Guides
Arena Guide	Best Arena Teams
Win 5 Battles in Arena With No Deaths	Arena and Aether Raids Seasons

Aether Raids

Aether Raids Articles
Aether Guides	List of Aether Raids Structures
Aether Raids Offense Guide	Best Aether Raid Defense Units

Summoner Duels

Summoner Duels Articles
Summoner Duels Guide