The Singer sings the Ruin Song every fall. The Ruin Song tells of Kira's village's history, and what happened that led up to it. It starts with Creation (closely following the Bible story) and leads up to current time.
The Singer sings the song, and spends days in preparation for it by resting his or her voice and sipping special oils.
The Carver carves the staff that the Singer carries during the Song. The staff has markings on it to remind the singer where they are in the song.
The Threader makes the robe that the Singer wears during the Song. When the singer is lost or forgets the song the robe reminds him or her.