Soy-Caleb

Soy-Caleb was an alliance between, obviously, Soy and Caleb from Trial By Fire that formed during the first days of the Metefole Tribe. The alliance stood strong ever since.

Significance
Caleb and Soy had one of the strongest alliances in the game. They were both each other's strongest ally and while they didn't talk a lot in their confessional chat, they managed through DMs.

Soy, with the rest of the Metefole Alliance, but primarily with Rolf and Caleb, organized Açai's vote setting the duo as a force to be reckoned with, and one of the strongest alliances of the game.

After that, Caleb and Soy got to a very peaceful time, they were both and Metefole and never lost an immunity challenge so they never had to agree on who to vote, they just remained ready for when the day came.

When the day came and merge hit, Soy convinced Caleb to add James and Mark into the alliance, a fatal mistake. James and Mark, both working for Harry, convinced Caleb he was being voted out, making him waste his idol. Caleb was voted out right after.