Are there any contextual indicators other than their character model? Are there any moments of dialog where someone uses gendered pronouns to refer to them? If the quest description is the only place where gendered pronouns are used to refer to the character, I don't see anything problematic about this. Character model settings aren't always literal, and the model settings they chose for this one don't scream a masculine design intent. And even if they did, that wouldn't automatically make these pronouns a mistake.