Someone who can rely on one another and trust them.
The tone of the story is somewhat humorous and the mood is uneasy. One of the themes of the Upturned Face is how destiny determines who dies and lives and how an individual very susceptible to death with just one blink. It is humorous because seeing two guys burying someone and at the same time fighting against someone is ridiculous.
As Convection currents moved tectonic plates slowly over time two plates would meet in a Convergent boundary and move upwards over millenniums.
