Tungsten is an Iron Choir member who lives in Centralia. He delivers supplies monthly to the Choir and serves as a contact point between them and the outside in the crashed ship A Collection of Inconsistencies. He helps the Chime reach Seabed City after they agree to escort him and help pay for his supplies, and then brings them to see Sister Rust.
He's in his forties or older, and has the Iron Choir symbol around his neck. He wears a mix of cut-up clothes and rags like the rest of the Choir and working-class Counterweight fashion, allowing him to fit in visually in Centralia. He plays the flute.