Halbu and Jamella, the vendors in the Pandemonium Fortress, are quite mysterious characters, with very few spoken lines and just two purposes: repairing/vendoring and giving quests.
On their wiki pages there aren't any useful informations about them, so I was just wondering: has there ever been any Word of God about their lore? Are they just there to be useful? This always seemed odd to me, especially considering the deep lore that's always been a distinguishing trait of Blizzard's games...