Forget random rolls and paywalls—Duet Night Abyss has flipped the mobile RPG formula on its head. In a revolutionary move, the game completely removed its gacha system, letting every player unlock powerful characters entirely through gameplay. That means success now depends on your strategy, not your wallet.
If you’ve just landed in the dark, dual-protagonist world of Duet Night Abyss, this guide breaks down how to unlock every character, which ones to prioritize, and how to efficiently farm their resources to assemble the best team possible.
๐งฉ How the New Character Unlocking System Works
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Collect Secret Letter Clues: Earn 15 per day via Daily Commissions, side quests, achievements, and weekly events like Mystic Maze and Nocturnal Echoes.
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Exchange for Secret Letters: Trade 10 clues for a character-specific letter in the Shop.
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Run Covert Commissions: Use your Secret Letter before starting a Covert mission to earn Thoughts.
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Unlock Characters: Gather 30 Thoughts for any character and unlock them in the Armoury > Reminiscence menu.
This makes Duet Night Abyss one of the fairest character systems in modern mobile gaming—no RNG, no spending, just progress.
๐ Character Unlocking Methods Overview
| Method | How It Works | Best For |
|---|---|---|
| Covert Commissions | Earn Thoughts via Secret Letters | Targeted farming for specific heroes |
| Story Progression | Unlock characters via quests | New players building a base roster |
| Event Rewards | Free Thoughts or full characters | Casual players |
| Premium Currency | Buy Thoughts directly (150 Plumules each) | Speeding up progression |
Free characters to start with:
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Margie — Complete the prologue
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Berenica — Pre-registration reward
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Truffle & Filbert — Finish the “Go, Geniemons!” and tutorial quests
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Lisbell — Complete Noctoyager [On a Gentle Breeze]
⚔️ Character Tier List (Intron Level 0 Evaluation)
๐ฅ DPS Tier List
| Tier | Characters | Highlights |
|---|---|---|
| SS | Rebecca, Lisbell, Yale & Oliver | Rebecca’s AoE hydro summons dominate mob fights; Lisbell offers unmatched burst and stun potential; Yale & Oliver excel at safe aerial damage. |
| S | Phantasio, Berenica, Psyche | Phantasio’s beast mode melts enemies but risks exposure; Berenica’s agile playstyle restores sanity easily; Psyche uses HP for ultimates and excels in kiting. |
| A | Rhythm, Lynn | Rhythm is mobile and scales to SS at Intron 6; Lynn’s strong ult shines with Laceration stacks. |
| B | Sibylle, Lady Nifle, Outsider | Decent but inconsistent—Lady Nifle scales well with sanity builds, Outsider tanks effectively. |
| C | Margie | Unique Jackpot gimmick but underwhelming damage. |
๐ Support Tier List
| Tier | Characters | Highlights |
|---|---|---|
| SS | Daphne | The best healer—party-wide heals, buffs, and debuffs for enemies. |
| A | Truffle & Filbert | Tanky duo with sustain and crowd control; scales to S-tier at Intron 6. |
๐ก Strategic Unlocking Recommendations
Early-Game Focus
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Margie — Free starter unit; decent until you unlock higher-tier DPS.
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Berenica — Reliable and safe mobility option for early content.
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Truffle & Filbert — Your early healer/tank hybrid with long uptime ultimates.
Endgame Farming Targets
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Rebecca — SS-tier DPS for AoE-heavy encounters.
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Daphne — Essential healer that fits all comps.
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Lisbell — High-skill, high-reward burst unit for advanced players.
๐ฎ The Intron System Explained
Once you’ve unlocked a character, duplicate Thoughts power them up via the Intron system (similar to Eidolons or Constellations).
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Lady Nifle and Rhythm reach top-tier performance at Intron 6.
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Lynn becomes much more viable with higher Introns.
Plan your farming to focus on these long-term investments.
⚙️ Farming & Resource Management Tips
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Do Daily Commissions — Your main source of Secret Letter Clues.
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Farm One Character at a Time — Don’t split your resources early.
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Use Weekly Modes — Mystic Maze and Nocturnal Echoes add major boosts.
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Progress the Storyline — Many unlocks are gated behind main quests.
๐️ Character Release Cycle
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First 28 Days: New characters appear in Immersive Theater.
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After 28 Days: They rotate to Nocturnal Echoes weekly boss drops.
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Later: Available in the shop via Secret Letter Clues.
๐ Conclusion
By removing gacha, Duet Night Abyss has made its character system transparent, fair, and skill-driven. Your progress now rewards strategy, not spending—and that makes each unlock feel genuinely earned.
Key Takeaways:
✅ Focus on free characters first (Margie, Berenica, Truffle & Filbert)
๐ฅ Target Rebecca, Daphne, and Lisbell for endgame power
๐ Use Dailies and Weeklies efficiently for steady progression
⚙️ Plan long-term for Intron scaling heroes
๐ Community & Resources Links
Stay connected with the Duet Night Abyss community for updates, tips, and exclusive rewards:
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