If there’s one thing that Duet Night Abyss absolutely nails, it’s the feeling of building a diverse, powerful roster. And best of all, every single character in the game is completely free to unlock. You don’t need to worry about gacha pulls, limited banners, or premium paywalls. Instead, Duet Night Abyss gives you a clear path to earn every character through gameplay.
But of course, free doesn’t mean instant. Unlocking every character in Duet Night Abyss takes time, effort, and a solid understanding of how each unlock method works. Whether you’re aiming to collect everyone or just grab your favorites, this Duet Night Abyss guide covers everything you need to know about how to unlock all characters. Also, check out our Beginner’s Guide, Character Tier List, and Redeem Codes article for a smoother start to your in-game journey.
How to unlock all Characters in Duet Night Abyss
In Duet Night Abyss, there are multiple ways to obtain characters, depending on who you’re trying to unlock. Some are given freely as story or event rewards, while others require a bit of farming using the game’s Secret Letter system.
It’s a simple but grindy process, especially since Secret Letters don’t guarantee a Thought drop every time. However, the system ensures that dedicated players can eventually collect every character without spending a dime. Below is a full breakdown of every playable character in Duet Night Abyss and how to unlock them:
| Character | How to Unlock |
|---|---|
| Psyche | Unlocked by progressing through the Immersive Theatre event. |
| Daphne | Progress the Main Story, and after completing The Overlookers quest, you’ll receive the Thought: Daphne to unlock her. |
| Berenica | Rewarded to players who pre-registered before the game’s launch. |
| Rebecca | Obtained by progressing the Main Story and opening the in-game mail reward. |
| Yale and Oliver | Unlocked through the Secret Letter system. Purchase their Secret Letter using 10 Secret Letter Clues, then open it after completing a Covert Commission. Collect 30 Thoughts to unlock them. |
| Phantasio | Unlocked via Secret Letters and Covert Commissions. You’ll need 30 Thoughts earned from successful Secret Letter runs. |
| Lisbell | Earned by clearing Stages I–VI of the Mystic Maze, a permanent event in the game. |
| Truffle and Filbert | Collect 30 Thoughts by completing the Tutorial: Covert Commissions and Go, Geniemons! side quests. |
| Fina | Acquired via the Secret Letter system. Buy her Secret Letter with 10 Secret Letter Clues and complete Covert Commissions until you gather 30 Thoughts. |
| Rhythm | Obtained through Secret Letters and Covert Commissions. Requires 30 Thoughts to unlock. |
| Hellfire | Available through the Secret Letter system. Gather 30 Thoughts from Covert Commissions to recruit her. |
| Lynn | Unlocked via Secret Letters purchased with Clues, then farmed through Covert Commissions. Requires 30 Thoughts. |
| Sibylle | Unlocked the same way as others through the Secret Letter system and Covert Commissions. Collect 30 Thoughts to add her to your roster. |
| Lady Nifle | Another Secret Letter character. Farm 30 Thoughts through Covert Commissions to unlock her. |
| Outsider | Automatically unlocked after completing the Prey VS Hunter Main Quest. |
| Randy | Unlocked through the Secret Letter system after collecting 30 Thoughts via Covert Commissions. |
| Tebethe | Acquired through the Secret Letter and Covert Commission process. Needs 30 Thoughts. |
| Margie | Your first character, automatically unlocked through story progression. |
Final Thoughts
Unlocking all characters in Duet Night Abyss is less about luck and more about dedication. So whether you’re grinding Covert Commissions for Secret Letters or progressing through story events, every step rewards your time with new allies, new strategies, and new layers of gameplay depth.
The removal of gacha systems means Duet Night Abyss puts control entirely in your hands, and you earn characters through effort, not chance. So dive into the missions, stock up on Secret Letters, and start assembling your ultimate squad. Before long, you’ll have a full roster of powerful warriors, each with their own flair, backstory, and combat style, waiting to shine in the abyss.
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