How to get Secret Letters guide for Duet Night Abyss (DNA). This includes all Character & Weapon Secret Letters, how to get Secret Letters, how to farm, uses, and more.
Table of Contents
All Secret Letters
Character Secret Letters
| Character Secret Letter | How To Get |
|---|---|
 Margie | - Exchange for 10 Secret Letter Clues at the Shop |
| Lady Nifle | - Exchange for 10 Secret Letter Clues at the Shop |
| Lisbell | - Reward from Nocturnal Echoes: Beast From the Snowfield Lv. 50 - First Clear Reward for all Mystic Maze Levels (I-VI) |
| Fina | - This is currently unknown since Fina will only be released on November 25, 2025 |
| Psyche | - Reward for clearing Immersive Theatre Featured Repertoire |
| Truffle and Filbert | - Reward from Nocturnal Echoes: Crystalophile Lv. 80 |
| Rebecca | - Exchange for 10 Secret Letter Clues at the Shop |
| Lynn | - Exchange for 10 Secret Letter Clues at the Shop |
| Sibylle | - Exchange for 10 Secret Letter Clues at the Shop |
| Tabethe | - Reward from Nocturnal Echoes: Sybille Lv. 50 |
| Phantasio | - Reward from Nocturnal Echoes: Beast From the Snowfield Lv. 80 |
| Berenica | - Exchange for 10 Secret Letter Clues at the Shop |
| Hellfire | - Reward from Nocturnal Echoes: The Warden of the Inferno Lv. 50 |
| Yale and Oliver | - Reward from Nocturnal Echoes: Crystalophile Lv. 50 |
| Daphne | - Exchange for 10 Secret Letter Clues at the Shop |
| Outsider | - Exchange for 10 Secret Letter Clues at the Shop |
| Randy | - Exchange for 10 Secret Letter Clues at the Shop |
| Rhythm | - Reward from Nocturnal Echoes: Eclosioner Lv. 50 |
Weapon Secret Letters
| Weapon Secret Letter | How To Get |
|---|---|
| Blade Amberglow | - Exchange for 10 Secret Letter Clues at the Shop |
| Vernal Jade Halberd | - Reward from Nocturnal Echoes: Crystalophile Lv. 40 |
| Undying Oneiros | - Exchange for 10 Secret Letter Clues at the Shop |
| Tetherlash | - Exchange for 10 Secret Letter Clues at the Shop |
| Viridis Reefs | - Reward from Nocturnal Echoes: Crystalophile Lv. 60 |
| Punitive Inferno | - Reward from Nocturnal Echoes: The Warden of the Inferno Lv. 40 |
| Elpides Abound | - Purchase for 75 Ticket Stubs from the Immersive Theatre's Memento Shop |
| Siren's Kiss | - Exchange for 10 Secret Letter Clues at the Shop |
| Ingenious Tactics | - Exchange for 10 Secret Letter Clues at the Shop |
| Shackle of Lonewolf | - Reward from Nocturnal Echoes: Sybille Lv. 40 |
| Remanent Reminiscence | - Exchange for 10 Secret Letter Clues at the Shop |
| Wandering Rose | - Reward from Nocturnal Echoes: Eclosioner Lv. 40 |
| Wanewraith | - Exchange for 10 Secret Letter Clues at the Shop |
| Ironforger | - Exchange for 10 Secret Letter Clues at the Shop |
| Pyrothirst | - Exchange for 10 Secret Letter Clues at the Shop |
| Exiled Fangs | - Exchange for 10 Secret Letter Clues at the Shop |
| Aureate Yore | - Reward from Nocturnal Echoes: Beast From the Snowfield Lv. 60 |
| Fathomless Sharkgaze | - Exchange for 10 Secret Letter Clues at the Shop |
| Momiji Itteki | - Exchange for 10 Secret Letter Clues at the Shop |
| Withershade | - Exchange for 10 Secret Letter Clues at the Shop |
| Sacred Favour | - Reward from Nocturnal Echoes: Beast From the Snowfield Lv. 40 |
| Screamshot | - Exchange for 10 Secret Letter Clues at the Shop |
| Soulrend | - Exchange for 10 Secret Letter Clues at the Shop |
| Arclight Apocalypses | - Reward from Nocturnal Echoes: The Warden of the Inferno Lv. 80 |
| Embla Inflorescence | - Reward from Nocturnal Echoes: The Warden of the Inferno Lv. 70 |
| Submerged Serenade | - Reward from Nocturnal Echoes: Eclosioner Lv. 80 |
| Daybreak Hymn | - Reward from Nocturnal Echoes: Beast From the Snowfield Lv. 70 |
| Dreamweaver's Feather | - This is currently unknown since Fina (It's signature owner) will only be released on November 25, 2025 |
| Exiled Thunderwyrm | - Reward from Nocturnal Echoes: Eclosioner Lv. 70 |
| Silent Sower | - Exchange for 10 Secret Letter Clues at the Shop |
| Blast Artistry | - Reward from Nocturnal Echoes: Sybille Lv. 80 |
| Stellar Finality | - Reward from Nocturnal Echoes: Sybille Lv. 70 |
| Entropic Singularity | - Exchange for 10 Secret Letter Clues at the Shop |
| Rendhusk | - Exchange for 10 Secret Letter Clues at the Shop |
| Sacrosanct Decree | Reward from Nocturnal Echoes: Eclosioner Lv. 60 |
| Bluecurrent Pulse | - Exchange for 10 Secret Letter Clues at the Shop |
| Destructo | - Exchange for 10 Secret Letter Clues at the Shop |
| Guixu Ratchet | - Reward from Nocturnal Echoes: Crystalophile Lv. 70 |
| Silverwhite Edict | - Exchange for 10 Secret Letter Clues at the Shop |
| Day of Sacred Verdict | - Reward from Nocturnal Echoes: The Warden of the Inferno Lv. 60 |
| Osteobreaker | - Exchange for 10 Secret Letter Clues at the Shop |
| Flamme De Epuration | - Exchange for 10 Secret Letter Clues at the Shop |
| Searing Sandwhisper | - Exchange for 10 Secret Letter Clues at the Shop |
| Excresduo | - Exchange for 10 Secret Letter Clues at the Shop |
| Sacrosanct Chorus | - Reward from Nocturnal Echoes: Sybille Lv. 60 |
How to Get Secret Letters Guide
Purchase From Shop
Most of the Secret Letters can be bought from the Shop using Secret Letter Clues. Each Secret Letter will cost 10 Secret Letter Clues regardless if it's for a character or a weapon.
How To Get Secret Letter Clues| Character Secret Letters in the Shop |
|---|
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| Weapon Secret Letters in Shop |
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Earn From Nocturnal Echoes (Weekly Bosses)
On the other hand, most Secret Letters from Weekly Bosses can only be acquired from them. Since you can only get 5 rewards from Weekly Bosses each week, it's best to plan out what Secret Letter to farm for.
| Character Secret Letters in Weekly Bosses |
|---|
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| Weapon Secret Letters in Weekly Bosses |
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Reward From Events
There are also Secret Letters that can be acquired through Events. Currently, Immersive Theatre and Mystic Maze have them as rewards.
| Secret Letters in Events |
|---|
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| Weapon Secret Letters in Events |
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Secret Letters Use
Get Characters, Weapons, & Wedges
Secret Letters are used to get a chance for a Character Thought, Weapon Blueprint or Wedges Blueprint to drop. You will need the specific Secret Letter to get the specific Character, Weapon, or Wedges that you want.
| Related Articles | |
|---|---|
| How to Get Characters | How to Get Weapons |
| How to Get Demon Wedges | - |
Use in Covert Commissions
You can then use your Secret Letters during Covert Commissions for them to drop. Do note that the Thoughts and Blueprints are random rewards. Using a Secret Letter does not guarantee a drop.
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