Yujin Build & Guide The First Descendant

Yujin is The First Descendant’s primary healing character, providing essential support during missions. His abilities include healing, debuffing enemies, and removing afflictions from allies, making him a versatile and valuable support character.


Yujin TFD

Feature Details
Role Support
Primary Skills Solidarity Healing, Restructure Serum, Stimulant Spray
Passive Skill Stop Overreacting
Specialization Healing allies, debuffing enemies, buffing allies
Unlock Methods Purchase or craft
Primary Strengths Fantastic healing support, beneficial buffs

Yujin Skills

Solidarity Healing
  • Description: Summons a Recovery Drone that attaches to allies to heal them. Recovers target and increases their ATK through an Accelerant effect upon dismissal.
  • Cooldown: 15 seconds
  • MP Cost: 20
  • Duration: 10 seconds
  • How to Use: Target an ally to heal them and boost their overall damage. This should be your most used ability to constantly heal and boost allies’ damage.
Restructure Serum
  • Description: Fires a Restructure Serum forward, decreasing DEF and inflicting Allergy. When attacking enemies with Allergy, heals nearby allies and grants additional healing to allies who kill the enemy.
  • Cooldown: 20 seconds
  • MP Cost: 25
  • Duration: 8 seconds
  • How to Use: Use on tough targets to decrease their DEF and inflict Allergy. Allies attacking the target will heal, rewarding focus fire on tough enemies.
Stimulant Spray
  • Description: Grants Stimulation to allies. While Stimulation is active, incoming DMG is reduced, and recovery is received when Stimulation ends.
  • Cooldown: 25 seconds
  • MP Cost: 30
  • Duration: 12 seconds
  • How to Use: Use to reduce incoming damage for allies and provide a recovery effect when Stimulation ends. This skill can save allies in critical situations.
Hyperreactive Healing Ground (Ultimate)
  • Description: Heals self and allies, granting Purification and Immunity to remove and prevent debuffs. Additional recovery is based on the number of allies and enemies within range. Yujin is granted the Hyper Activity effect, increasing his ATK and skill power.
  • Cooldown: 60 seconds
  • MP Cost: 50
  • Duration: 15 seconds
  • How to Use: Save for a panic button or a boss fight where allies are taking damage. Provides significant healing and buffs to the team.
Stop Overreacting (Passive)
  • Description: Significantly reduces the time to rescue allies. Targets rescued by Yujin increase to Max HP for a certain period of time.
  • How to Use: Benefits when an ally is downed, and you lift them up, making it easier to keep the team alive.

How to Unlock Yujin in The First Descendant

To unlock Yujin in The First Descendant, you must research or purchase him from the store. If you choose to craft Yujin, gather the following materials:


1. Yujin Enhanced Cells

  • Repton x422
  • Monad Shard x246
  • Organic Biogel x31
  • Yujin Enhanced Cell Blueprint x1
  • 200,000 Gold

2. Yujin Stabilizer

  • Repton x422
  • Monad Shard x246
  • Low-Carbon Activator x64
  • Yujin Stabilizer Blueprint x1
  • 200,000 Gold

3. Yujin Spiral Catalyst

  • Repton x422
  • Monad Shard x246
  • Insulated Metallic Foil x43
  • Yujin Spiral Catalyst Blueprint x1

To craft Yujin, speak to Anais in the Albion Mountains area to access the Research Institute.

How to Play Yujin in The First Descendant

Yujin’s playstyle focuses on healing and buffing allies while debuffing enemies.

  • Support and Healing: Use Solidarity Healing and Stimulant Spray to keep allies healthy and buffed.
  • Debuffing Enemies: Use Restructure Serum to decrease enemy DEF and inflict Allergy, providing healing to allies attacking the afflicted target.
  • Ultimate Ability: Use Hyperreactive Healing Ground during critical moments to heal the entire team, remove debuffs, and boost your own attack and skill power.

Best Modules for Yujin in The First Descendant

Equip the following modules to optimize Yujin’s performance:

  • Solidarity Strength: Increases the healing power of Solidarity Healing.
  • Serum Efficiency: Enhances the effectiveness of Restructure Serum, increasing its debuff duration and potency.
  • Spray Potency: Boosts the damage reduction and recovery effects of Stimulant Spray.
  • Healing Mastery: Improves overall healing abilities and skill power.
Best Reactor Stats for Yujin in The First Descendant

Best Reactor Stats for Yujin in The First Descendant

The best reactors for Yujin boost healing power and skill efficiency. Prioritize reactors that enhance support skills and reduce cooldowns for maximum effectiveness.

Best Weapons for Yujin in The First Descendant

The ideal weapons for Yujin include:

  • Medic Rifle: Provides healing and support buffs to allies.
  • Guardian Pistol: Offers defensive bonuses and enhances healing effects.

Best External Components for Yujin in The First Descendant


For external components, prioritize the following stats to enhance Yujin’s support capabilities and survivability:

  • Healing Power
  • Skill Efficiency
  • Cooldown Reduction
  • DEF

Yujin Story in The First Descendant

Yujin began his career as a doctor at Albion’s only civilian hospital but was pulled into the military by his mother, who had submitted an application on his behalf. A doctor herself, she did not like her son’s sometimes dismissive and quick-tempered attitude. Both now serving in the Medical Corps, they would often be at odds over treatment and the amount of effort that Yujin put into saving hopeless-looking cases.

Yujin regretted their arguments and one day resolved to apologize, but she died while heading to the battlefield to treat a new wave of Vesper casualties. Losing his mother was crushing, for he had always loved her despite their arguments. He rushed to find his mother on the battlefield but was unable to heal her wounds before she died. Her last word implored him to do everything he could to treat all of his patients until their final moments.

Thus, Yujin was filled with new-found resolve. When Gley returned from the experiments the Vulgus had subjected her to, Yujin did everything he could to treat her. He sustained injuries as she struggled, but when he finally managed to calm her down, his healing Arche awoke.

Yujin is an invaluable character in The First Descendant, offering exceptional healing and support. By mastering his skills and effectively managing cooldowns, players can maximize Yujin’s potential and ensure their team’s success in even the most challenging battles. Whether you choose him as your starting character or unlock him later, Yujin is a powerful asset to any team.