Belub can be first encountered in Moonrise Towers' main hall, observating a group of new Absolutist pilgrims. He shows contempt for the pilgrims, and remarks on their lack of skills and usefulness. The party can then either convince Belub to keep the pilgrims, or tell him to get rid of them.
[PERSUASION] They have potential. Great warriors have grown from less. (DC 14)
Its not our place to question the Absolute's will.
Then get rid of them. The undeserving should be purged.
The first two options will have Belub send them to the war camp west of Reithwin, where the pilgrims will then disappear. Telling Belub to get rid of the pilgrims will lead to the death of Pilgrim Farimorn, Pilgrim Iong, Pilgrim Nalira, and Pilgrim Taima.
Defending Moonrise Towers
If the Nightsong is freed and the Harpers launch their assault on Moonrise Towers, Belub will be part of the remaining forces defending Moonrise Towers. Belub can be found on the rafters above the ground floor's main hall and Disciple Z'rell, where he can sit to harass the party and their allies.
Range: 9 m / 30 ft 
Melee: 1.5 m / 5 ft 
