Duet Night Abyss involves two protagonists: Phoxhunter and the Boy/Girl in the Dream. At the beginning of a new campaign, you set a name and pick a gender presentation (male or female) for each independently. This affects the characters' visual appearance and voice acting but not the core story, which remains identical regardless of gender choices.

The game’s structure allows both characters to be male, female, or a mixed pair, with all combinations treated equally in the narrative. The dual narrative alternates between these leads.

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by u/Gaur2704 from discussion
in DuetNightAbyssDNA

However, these gender assignments are permanent within your save file. There is no toggle or setting in the game to alter a character’s gender once you begin. So, take time during setup to listen to voice lines and see if model previews for each gender option fit your preference.

How to choose gender in Duet Night Abyss

  • At game start, you will name and assign a gender to Phoxhunter.
  • Then, independently, name and assign a gender to the Boy/Girl in the Dream.
  • Confirm selections; these apply for the entire campaign.
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by u/Gaur2704 from discussion
in DuetNightAbyssDNA

How the gender choices affect gameplay

Aspect Impact of Gender Choice
Character model and art Distinct male or female visual design for each protagonist
Voice acting Separate voice lines recorded for male and female options
Story and gameplay No difference; plot and chapter order remain consistent
Changing gender later Not possible after initial selection

To reiterate, Duet Night Abyss offers flexible initial gender selection for its two main characters. But, the gender choice is permanent. There is currently no in-game option to change the gender after starting.