Duke of Mazomba
He's noted for having remained single to his age - which is considered unusual and mildly scandalous - and for not having much of a relationship with his only niece. Other than that, he has a very minor role, and it's possible to finish the game without him getting more than a passing comment.
If Elodie faces a vote of no-confidence, he will always vote in Elodie's favor, no matter her previous actions.
Armand is a possible candidate for guardianship of Adair. Choosing him will cause a loss of -10 Noble Approval and may displease Arisse, but will also guarantee Adair's safety and keep Elath's forces out of Arisse's control should a civil war take place later.
If Joslyn lives to the end of the game, and isn't pressured or convinced to remarry, the epilogue mentions how he remains a widower for the rest of his life, redirecting any romantic attentions to his younger brother Armand.
If Joslyn dies, and Elodie has the Merva family exterminated, the epilogue mentions that despite being her only remaining relative Armand completely refuses to have anything to do with Elodie anymore.
- His portrait is a combination of Joslyn's face and Talarist's (recolored) hair with different clothes.