In order of appearance:
Vick the Wicked. Sold his face to the Skin King, who has become a close personal friend.
Sebastian the Elf. Devoted to Karnopticon. Breathes bugs.
Stoner the Astrologer. The Common Man, hero of Vornheim, impersonating Lord Thrawl.
Miserly. Animal lover.
Wilson the Cleric. Consumed by the Skin King. Eventually released, but the King botched it when putting his skin back on.
Python the Pygmy. Disassembled and then reassembled by giant holographic brain.