Duke Belt is one the Grand Dukes of Baldur's Gate as well as a member of the Council of Four, along with Entar Silvershield, Liia Jannnath and Eltan.

In the game Baldur's Gate, Duke Belt will be in the Duchal Palace introducing Sarevok as one of the Grand Dukes of the city of Baldur's Gate. After being ambushed by greater doppelgangers, you can give the Duke Sarevok's journal to prove Sarevok's guilt. Belt will then transport you to the Thieves' Guild.

In Baldur's Gate and Baldur's Gate II, he appears as the main tutor in the tutorial.