Halbu

Halbu is a resident of the Pandemonium Fortress. His faith is unshakable, and he comes across as being a zealot.

To Hell and Back
Halbu was present in the Pandemonium Fortress during the arrival of a group of mortal heroes who were pursuing Diablo. He and Jamella had come to the fortress with the explicit intent of helping the heroes. While not working in his shop, he prayed fervently for their success. (which they achieved).

Reaper of Souls
"The fortress has changed since then. Its new master did not suffer our presence for long."

- Jamella

Halbu and Jamella were within the Pandemonium Fortress when Malthael chose it as his abode. Both of them were killed. However, they remained in ghostly form, where they aided the Nephalem.

Diablo II
In Diablo II, Halbu is one of the two NPC merchants found in the Pandemonium Fortress of Act IV. Like his counterpart Jamella, he speaks very little, never offering advice or opinions on any quests. Halbu's only words are spoken, and selected from a variety of short phrases. He offers one each time a particular character returns to town.

Despite his near-silence, Halbu is a very useful NPC. He sells a wide variety of armor and weapons, along with bolts and arrows. He also handles the repair tasks in Act IV. When not engaged with the player, Halbu can often be seen kneeling in prayer.

Quotations

 * "Hail to you, Champion."
 * "What do you need?"
 * "Hello."

Diablo III
Halbu appears as a ghost in Act V of Diablo III, on level 1 of the Pandemonium Fortress. They give the player(s) a quest to destroy a Scavenger and soul-harvesting devices.

Quotations

 * "The fortress has changed since then. Its new master did not suffer our presence for long." ("About the Spirits")