Fire Emblem Three Hopes: Merc Whistle Guide

This Merc Whistle guide will let you know all about the Merc whistle and who to give it to.

Fire Emblem Three Hopes Merc Whistle

The Merc Whistle is a special item that enhances a character’s powers and makes them more formidable. It can become the very thing that gives you an edge in a fight. You can obtain the Merc Whistle through two different methods. You can either spend renown on purchasing it, or you can play the game out naturally.

When you complete chapter 10, Shez will receive the Merc Whistle as a reward.

Key Takeaways

The Merc Whistle is a valuable item that enhances characters’ abilities and makes them more formidable. Here’s how to obtain and use it:

  1. Acquiring the Merc Whistle: You can obtain the Merc Whistle through spending renown or by playing the game naturally. It is rewarded after clearing Chapter 10.

  2. Using the Merc Whistle: To use the Merc Whistle, you must give it to a character with whom you have an A-level support. Interact with the character, and you will receive their ability as a gift, unlocking an achievement in the process.

  3. Choosing the Right Character: Since you can obtain only one Merc Whistle per playthrough, it’s essential to choose the character wisely. Giving a character the Merc Whistle grants you access to their unique ability, so consider the character’s strengths and your playstyle.

Merc Whistles Support List

Here is a summary table for Merc Whistles with respect to the characters in Fire Emblem Three Houses:

No.CharacterCurrent Ability Acquired Ability
1BylethTactics PrimerDivine Pulse
2EdelgardImperial LineageSolar Prominence
3DimitriAzure DaggerAzure Lighting
4ClaudeLeicester LineageDustcloud
5MercedesLive to ServeRadiant Love
6AnnettePerserveranceCourageous Aria
7SylvianPhilandererGordian Strike
8IngridLady Knight Plunge
9FlaynLily's Poise Luminous Prayer
10LorentzDistinguished House Rondo of Roses
11HildaAdvocateLightning Bound
12MarianneAnimal Friend Snowslip
13FelixLone Wolf Intense Velocity
14ConstanceCircadian BeatPersonality Shift
15BalthusKing of GrapplingGolden Fists
16DedueStaunch ShieldDemolisher
17ShamirSurvival InstinctCold Calculation
18FerdinandConfidenceMaximum Ambulation

How To Use Merc Whistle

Finding the Fire Emblem Three Hopes Merc Whistle
Rewards for Clearing Chapter 10

Here’s how to use the Merc Whistle effectively:

  1. Recipient Selection: You can only give the Merc Whistle to a character with whom you have A-level support.

  2. Interaction: Once you give the Merc Whistle to a character, interact with them, and after a while, they will gift you their ability.

  3. Combat Advantage: The received ability can significantly impact your combat capabilities, allowing for more damaging combos and diverse strategies.

  4. Achievement: By receiving a gift from your team and obtaining a skill through the Merc Whistle, you unlock the ‘A True Friend’ achievement.

Who To Give The Merc Whistle

There are several characters that you can give the Merc Whistle. But not everyone would be as impactful as you would like. That is why this list will inform you beforehand of what abilities you will be getting when you gift the Merc Whistle to certain characters.


Fire-Emblem Three Hopes Byleth

Byleth’s ability, Divine Pulse, obtained through the Merc Whistle, is a powerful addition to your arsenal in Fire Emblem: Three Hopes. Here’s how to make the most of this ability:

  1. Recruit Byleth: First, recruit Byleth to your team if she isn’t already a part of it.

  2. Gift Merc Whistle: Give Byleth the Merc Whistle to unlock her unique ability, Divine Pulse.

  3. Divine Pulse Mechanics: Divine Pulse allows you to stop time during battle, granting you a guaranteed hit on opponents. Time only resumes after you attack, so you can carefully plan your moves. The cooldown of this ability depends on the damage you deal, giving you the opportunity to use it again if your initial attack didn’t meet your expectations.

  4. Strategic Advantage: Divine Pulse opens up a world of strategic possibilities. You can ensure critical hits, dodge enemy attacks, and make precise moves to one-shot enemies, increasing your chances of success on the battlefield.

Utilizing Byleth’s Divine Pulse effectively can be a game-changer in challenging battles, helping you secure victory and overcome tough opponents with ease.


Next up, we have Edelgard. Edelgard is the Leader of Scarlet Blaze (Black Eagles) and the one chasing the title of the future emperor. She deals massive amounts of damage with her axe due to her extraordinary gift and ability.

Gifting her the whistle would give you her ability, Solar Prominence. This ability allows you to imbue your attacks with fire. This will allow you to heaps loads of damage and decimate your enemies in a matter of seconds.


Dimitri is the Leader of Azure Gleam (Blue Lions), possessing the immense natural talent to topple over armies. He is known as the Crown Prince of the Kingdom of Faergus and has the unique gift, Azure Dagger.

If you give him the whistle the whistle, he will grant you the ability, azure lighting. This allows you to imbue your attacks with lightning. This is undoubtedly very appealing as the lightning ability isn’t very common and deals considerable damage.


Next up, we have Claude. The Leader of Golden Wildfire (Golden Deer). He is known as a proficient wyvern master who strikes his enemies with his bow. Riding a wyvern is no menial task, and his gift to you in exchange for the whistle can perhaps allow you to follow in his footsteps.

Claude gives you the ability, Dustcloud. This ability imbue your attacks with wind, allowing them to hit the targets more accurately from a distance. This enables you to take out your opponents swiftly while dealing massive damage.


Mercedes is a member of the Azure Gleam, having magical prowess as her strong suit. Giving her the Merc Whistle would provide you with the unique ability, Radiant Love. This ability acts as a support ability. When you attack, you will see the ability gauge filling up. That gauge restores your HP and, once fully filled, damages enemies and heals allies upon use.


She is a member of the Azure Gleam. Gifting her the whistle would give you her unique ability, Courageous Aria. this works just Radiant love. When the unique ability gauge fills, it reinforces your defenses and allies. This allows them to handle high damaging abilities without burning into a crisp.


Sylvian is a part of Azure Gleam and grants you the ability, Gordian Strike. This relies on your ability to land hits. Once your hits amount to 300, it increases your damage and attack range. This is a growing ability that keeps on improving its benefits as your hit count increases.


She is a member of Azure Gleam. If you give her the Merc Whistle, she will provide you with the ability Icy Plunge. IT allows you to release an AOE attack. It displaces the enemies close to you, and those in the air explode to deal ice damage in that area.


Up next, we have Flayn. She gives you the unique ability, Luminous Prayer. This allows you to spawn orbs of light when you deal with regular attacks. Pressing the skill again enables you to fire a light beam at the orb.


Lorentz is part of the Golden Wildfire. She gives you the ability, Rondo of Roses. This ability also has an Ability gauge. Once this gauge fills, it allows you to pull in enemies a little far from you. It can be an excellent opener to initiate fights or end them.


Hilda, a veteran of the Golden Wildfire, grants “Lightning Bound.” Holding the button boosts your damage slightly and imbues it with the lightning element, making it effective against lightning-weak foes. While charging, it acts like “Rondo of Roses,” pulling nearby enemies closer to you.


Next up, we have Marianne. She is a member of Golden Wildfire. Her unique ability is Snowslip. Once you have 300 hits, it spawns ice orbs that damage your opponents. The orbs keep on increasing as your hit count rises.


Felix is a vital member of Azure Gleam that grants you the unique ability, Intense Velocity. This ability enhances your maneuverability. When you dodge an attack, the ability increases your movement speed for a while. This allows you to close the gap between ranged opponents and deal the decisive blows.


Constance is a member of the Ashen Wolves. She gives you the unique ability, Personality Shift. It spawns orbs with every auto-attack. These orbs can take two colors, black or white, and can be launched toward your enemies to deal damage,


Balthus is part of Ashen Wolves. He possesses the unique ability, Golden Fists. Upon having 300 hits, it increases the damage of your attacks which keeps on growing as your hit count rises. If you manage to airborne the enemies, it even grants you some gold.


Dedue is part of the Azure Gleam. He gifts you the unique ability, Demolisher. If you hold the ability, when launching attacks, it deals with blasts on impact, adding damage to your attacks.


Shamir is a member of the Golden Wildfire that will gift you the ability called Cold Calculation. This ability rewards you with striking the enemies at the right time. Upon striking, your critical hit chance is raised, and your attacks are imbued with the ice element. This could be an excellent ability to have in your arsenal as it allows you to deal bonus damage and fixes your attack timing.


Ferdinand from the Scarlet Blaze grants “Maximum Ambulation,” a unique ability. It activates after 300 hits, boosting your character’s speed as hit counts rise.

Several characters offer powerful abilities when gifted the Merc Whistle. The standout choices are Divine Pulse, obtained from Byleth. We recommend Divine Pulse due to its time-pausing ability, allowing strategic advantages in battles. If it doesn’t suit your style, consider other options.

This concludes our Fire Emblem Three Hopes Merc Whistle guide. Let us know down below which ability you chose.

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