He is first encountered in Snowline, where he wants you to discover Tanyin's plans and then investigate the extent to which the Imperial government is supporting Lakvan in his stronghold. He then moves to Dragonstar West, where he first wants you to check on the health of the leader of the Thieves' Guild and then to eliminate a Skyrim foothold in Loth' Na Caverns.
He holds one of the eleven Shadowkeys, and one of the seven Star Teeth.
- Porliss Caith Subterfuge: Refuse Tanyin Aldwyr's goblin mission.
- Porliss Lakvan Evidence: Find evidence of Imperial influence for Porliss Caith.
- Porliss Loth' Na: Eliminate the Skyrim forces of General Duvais in Loth' Na Caverns.
- Porliss Thieves' Guild: Make sure the head of the Thieves Guild is still alive.