4 Star Hero Unlock Potential Tier List | Fire Emblem Heroes

This is a tier list for the best 4 Star Heroes to Unlock Potential for in FEH. Use this tier list to know whether or not the 4 star heroes you pulled should be rerolled, or if you want to find out who the best 4 star heroes are.

4 Star Hero Unlock Potential Tier List

S Rank: Spend Your Feathers Here!

Hero	Rarities	Upgraded to 5★
Aversa	4★ 3★	Recommended IVs: Base Values ・Aversa’s Night can be unlocked ・Inflicts an extremely powerful penalty on all foes
Arvis	4★ 3★	Recommended IVs: Base Values ・ Valflame can be unlocked ・The Exclusive Skill Recover Ring is unlocked as well
Tharja	4★ 3★	Recommended IVs: +Spd ・Tharja's Hex can be unlocked ・4★ with +10 merges is also a good option
Black Knight	5★ 4★	Recommended IVs: Base Values ・Alondite and Black Luna can be unlocked ・Can counterattack at any range
Xander	4★ 3★	Recommended IVs: Base Values ・Siegfried can be unlocked ・Can counterattack at any range
Reinhardt	4★ 3★	Recommended IVs: +Atk ・Dire Thunder can be unlocked ・Ranks among the top attackers of all Heroes
Naesala	4★ 3★	Recommended IVs: Base Values ・Raven King Beak can be unlocked ・A flying attacker who is capable of moving 3 spaces
Camus	4★ 3★	Recommended IVs: Base Values ・Gradivus can be unlocked ・Can counterattack at any range
Reyson	5★ 4★	Recommended IVs: Base Values ・Heron Wing can be unlocked ・Skillselt allows for movement up to 3 spaces and gies him a refresher skill
Nino	4★ 3★	Recommended IVs: +Spd ・Gronnblade+ can be unlocked ・4★ with a +10 merge is also a great option
Klein	4★ 3★	Recommended IVs: +Atk ・Brave Bow+ and Quick Riposte 3 can be unlocked ・4★ with +10 merges is another good option
Gordin	4★ 3★	Recommended IVs: +Spd ・Unlocks Renowned Bow ・Can unleash powerful consecutive attacks

A Rank: Solid Option to Invest Feathers In

Hero	Rarities	Upgraded to 5★
Astram	4★ 3★	No Access to IVs ・Unlocks Mercurius ・Buffs nearby physical attackers
Itsuki	5★ 4★	Recommended IVs: Base Values ・Unlocks Mirage Falchion ・Powerful against dragons
Marth	4★ 3★	Recommended IVs: +Atk ・Falchion can be unlocked ・Weapon is effective against dragons and grants HP recovery
Valentine's Titania	5★ 4★	Recommended IVs: Base Values ・Loyal Wreath+ can be unlocked ・Very valuable as a Red Tome-wielding unit
Joshua	5★ 4★	Recommended IVs: Base Values ・Audhulma can be unlocked ・Balanced Hero with excellent stats and very high defense
Masked Marth	5★ 4★	Recommended IVs: Base Values ・Falchion can be unlocked ・Powerful anti-dragon
Tiki (Adult)	4★ 3★	Recommended IVs: +Def ・Lightning Breath+ can be unlocked ・4★ with +10 merges is also a great option
Caeda	4★ 3★	Recommended IVs: +Atk ・Wing Sword can be unlocked ・Useful as an anti-armor or anti-cavalry unit
Ares	5★ 4★	Recommended IVs: +Atk ・Dark Mystletainn can be unlocked ・Can use specials in succession
Rinea	5★ 4★	Recommended IVs: Base Values ・Unlocks Silver Goblet+ ・No need to unlock potential if only using for her refresher assist
Fallen Delthea	4★ 3★	Recommended IVs: Base Values ・Unlocks Death ・Excellent attack phase unit
Mordecai	5★	Recommended IVs: +Def ・Unlocks Sabertooth Fang ・Very good Def tank
Panne	4★ 3★	Recommended IVs: Base Values ・Taguel Fang can be unlocked ・High mobility and holds a weapon that is effective against cavalry foes
Nowi	4★ 3★	Recommended IVs: +Def ・Lightning Breath+ can be unlocked ・4★ with +10 merges is another good option
Kana (M)	4★ 3★	Recommended IVs: Base Values ・Brazen Def/Res 3 can be unlocked ・A dragon unit with very high defense
Clair	4★ 3★	Recommended IVs: +Atk ・Rhomphaia can be unlocked ・Possesses an extremely strong weapon that is effective on armored and cavalry units
Est	4★ 3★	Recommended IVs: +Atk ・Whitewing Spear can be unlocked ・A top contender for an all-Flying party
Effie	4★ 3★	Recommended IVs: +Atk ・Death Blow 3 can be unlocked ・Has an amazing Atk stat
Azura (Young)	5★ 4★	Recommended IVs: Base Values ・Book of Shadows can be unlocked ・A powerful tome attacker with a refresher skill
Cecilia	4★ 3★	Recommended IVs: +Atk ・Gronnraven+ can be unlocked ・4★ with +10 merges is also a good option
Fae	4★ 3★	Recommended IVs: +Def ・Light Breath+ can be unlocked ・4★ with +10 merges is also a good option
Python	5★	Recommended IVs: +Spd ・Unlocks Short Bow+ ・One of the few green bow cavalry units
Cherche	4★ 3★	Recommended IVs: +Atk ・Cherche's Axe can be unlocked ・Being able to attack in succession makes her very powerful
Kagero	4★ 3★	Recommended IVs: +Atk ・Poison Dagger+ can be unlocked ・This weapon is ranged and effective on infantry units, making it very easily applicable
Louise	5★ 4★	No IVs available ・Unlocks Bouquet Bow+ ・Easy to include in a cavalry party thanks to Hone Cavalry
Kronya	4★ 3★	No IVs available ・Unlocks Athame ・Weapon skill has Vantage built into it

B Rank: Unlock Potential if you Have Extra Feathers

Hero	Rarity	Upgraded to 5★
Soleil	4★ 3★	Recommended IVs: +Spd ・Firesweep Sword+ can be unlocked ・Extremely powerful attacker
Hana	4★ 3★	Recommended IVs: +Spd ・Unlocks Hana's Katana ・Anti armor unit with good Atk and Spd
Zephiel	4★ 3★	Recommended IVs: Base Values ・Eckesachs can be unlocked ・Armored unit with excellent stats
Eirika	4★ 3★	Recommended IVs: +Atk ・Sieglinde can be unlocked ・Best saved for after you have unlocked the Weapon Refinery
Seliph	4★ 3★	Recommended IVs: +Atk ・Unlocks Tyrfing ・Can add the effect of Miracle via the Weapon Refinery
Silvia	5★ 4★	Recommended IVs: +Spd ・Works great in a movement refresher type role ・You do not need to use Unlock Potential if you only intend to use her for Dance. 4★ with +10 merges is another good option
Summer Fiora	5★ 4★	No Access to IVs ・Unlocks Petal Parasol+ ・Flying unit with balanced stats
Kempf	4★ 3★	No Access to IVs ・Unlocks Venin Edge ・Inflicts area damage to nearby foes after combat
Alfonse	4★	Recommended IVs: Base Values ・Fólkvangr can be unlocked ・Can be made into an Arena Score Booster or a Quests and Missions Hero
Garon	4★ 3★	Recommended IVs: Base Values ・Breath of Blight can be unlocked ・Neutralizes "effective against dragons" bonuses
Sophia	4★ 3★	Recommended IVs: +Def ・Unlocks Eternal Tome ・Very powerful against colorless foes
Lyon	4★ 3★	Recommended IVs: Base Values ・Naglfar can be unlocked ・Recommended for players who do not have a red-tome wielding Hero with Rauðrraven+
Morgan (M)	5★ 4★	Recommended IVs: +Spd ・Grima's Truth can be unlocked ・Turns foe's bonuses into penalties
Arden	5★ 4★	Recommended IVs: Base Values ・The Exclusive Skill Follow-Up Ring can be unlocked ・Extremely high HP and Def
New Year Eir	5★ 4★	No Access to IVs ・Unlocks Temari+ ・Excellent debuff support
New Year Laegjarn	5★ 4★	Recommended IVs: Base Values ・Wagasa+ can be unlocked ・Having 2 debuff skills makes her incredibly useful
Brunnya	5★ 4★	No Access to IVs ・Unlocks Fimbulvetr ・Nullifies penalties and converts to bonuses
Tailtiu	5★ 4★	Recommended IVs: +Spd ・Blárblade+ can be unlocked ・An excellent pick for a high Atk/high Spd attacker
Roderick	4★ 3★	Recommended IVs: +Spd ・Firesweep Lance+ can be unlocked Allows him to strike foes without being counterattacked
Lukas	4★ 3★	Recommended IVs: +Def ・Killer Lance+ can be unlocked ・Def stat ranks among the top of all Heroes
Sigrun	5★ 4★	No Access to IVs ・Unlocks Reprisal Lance+ ・Easy to use in a flier party thanks to Hone Fliers
Cordelia	4★ 3★	Recommended IVs: +Atk ・Brave Lance+ can be unlocked ・An excellent pick for a high Atk/high Spd attacker
Thea	5★ 4★	Recommended IVs: +Def ・Unlocks Vanguard+ ・A flier with balanced stats
Cormag	4★ 3★	No Access to IVs ・Unlocks Slaying Lance+ ・Flying unit with high Atk and Def
Valentine's Eliwood	5★ 4★	Recommended IVs: Base Values ・Fire Boost 3 can be unlocked ・Armored unit with excellent stats
Robin (M)	4★ 3★	Recommended IVs: +Def ・Tactical Bolt can be unlocked ・Upgrading via the Weapon Refinery grants excellent team bonuses
Sharena	4★	Recommended IVs: Base Values ・Fensalir can be unlocked ・Can be made into an Arena Score Booster or a Quests and Missions Hero
Saias	4★ 3★	Recommended IVs: Base Values ・Wargod's Tome can be unlocked ・Unique Weapon inflicts two penalties on foes
Silas	5★ 4★	Recommended IVs: +Def ・Unlocks Slaying Spear+ ・High Def and effective on armored units
Conrad	4★ 3★	No Access to IVs ・Unlocks Barrier Lance+ ・Cavalry unit with high defensive stats
Valbar	4★ 3★	Recommended IVs: +Def ・Unlocks Brave Lance+ ・Excellent candidate for Wary Fighter
Echidna	5★ 4★	Recommended IVs: +Spd ・Unlocks Rearguard+ ・Attack phase axe unit with balanced stats
Ross	4★ 3★	Recommended IVs: +Atk ・Unlocks Brave Axe+ ・With a high Atk stat, can deal tons of damage if striking twice
Halloween Dorcas	5★ 4★	Recommended IVs: Base Values ・Hack-o'-Lantern+ can be unlocked ・Works well in a tank-like role
Linus	4★ 3★	Recommended IVs: Base Values ・Basilikos can be unlocked ・Recommended for players who do not have a Hero with Raven
Summer Ylgr	5★ 4★	No Access to IVs ・Unlocks Shoreline Rake+ ・High Spd and easy to use
Hawkeye	4★ 3★	No Access to IVs ・Unlocks Guardian's Axe ・Great defensive stats to tank attacks
Walhart	4★ 3★	Recommended IVs: Base Values ・Wolf Berg can be unlocked ・High Atk and Def stats
Boey	4★ 3★	Recommended IVs: +Def ・Unlocks Inscribed Tome ・Powerful against colorless foes, and can gain close counter through the Weapon Refinery
Camilla	4★ 3★	Recommended IVs: Base Values ・Unlocks Camilla's Axe ・Flying unit with balanced stats
Titania	4★ 3★	Recommended IVs: +Def ・Draconic Poleax can be unlocked ・Upgrading via the Weapon Refinery grants excellent team bonuses
Robin (F)	3★ 2★	Recommended IVs: Base Values ・Draconic Poleax can be unlocked ・B Tomebreaker 3 is a very useful skill
Michalis	4★ 3★	Recommended IVs: Base Values ・Hauteclere can be unlocked ・A flying attacker with amazing Atk and Def stats
Frederick	4★ 3★	Recommended IVs: +Atk ・Unlocks Frederick's Axe ・Anti armor unit with high Atk and Def
Anna	4★	Recommended IVs: Base Values ・Nóatún can be unlocked ・Can be made into an Arena Score Booster or a Quests and Missions Hero
Picnic Leo	5★ 4★	No Access to IVs ・Unlocks Sandwiches!+ ・Excellent for tanking ranged attacks with Quick Riposte 3 and Distant Def
Winter Jaffar	5★ 4★	No Access to IVs ・Unlocks Minty Cane+ ・High defensive stats and good at tanking ranged attacks
Spring Loki	5★ 4★	No Access to IVs ・Unlocks Beguiling Bow+ ・One of the few flying archers
Rolf	5★ 4★	No Access to IVs ・Unlocks Candlewax Bow+ ・Easy to use with default skillset
Winter Cecilia	5★ 4★	Recommended IVs: Base Values ・Goodie Boot+ can be unlocked ・A rare dagger-wielding armored Hero
Takumi	5★ 4★	Recommended IVs: Base Values ・Close Counter can be unlocked ・Allows him to counterattack even non-ranged foes
Fallen Takumi	4★ 3★	Recommended IVs: Base Values ・Skadi can be unlocked ・This skill triggers on the third turn and is very powerful
Saizo	4★ 3★	Recommended IVs: +Spd ・Smoke Dagger+ can be unlocked ・Best saved for after you have unlocked the Weapon Refinery
Sothe	5★ 4★	Recommended IVs: +Atk ・Peshkatz can be unlocked ・A dagger-weilding unit capable of dealing heavy damage
Felicia	4★ 3★	Recommended IVs: +Atk ・Felicia's Plate can be unlocked ・Gains the ability to calculate damage using the lower of a foe's Def and Res
Ethlyn	5★ 4★	Recommended IVs: Base Values ・Spd/Def Bond 3 can be unlocked ・A fantastic support unit
Nanna	5★ 4★	Recommended IVs: +Spd ・Restore+ can be unlocked ・A high Spd staff-wielding cavalry unit
Mercedes	5★	Recommended IVs: +Def ・Gravity+ can be unlocked ・Excellent Res tank

Unlock Potential Summary

This tier list is based on our recommendations for using Unlock Potential on 4★ Heroes. 4★+10 Heroes have the same stats as 5★+5 Heroes, so it is sometimes better to continue to Merge Allies with a 4★ Hero instead of using Unlock Potential to increase their rarity. For this reason, you should prioritize Heroes who gain powerful Exclusive Skills at 5★ or Heroes that you simply love when using Unlock Potential.

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Tier Lists
Hero Tier List	Reroll Tier List	Skill Tier List
Source Heroes	Weapon Refinery	Unlock Potential