Based on what's been mentioned, Towa seems to be an independent system which was created by the Beastmem themselves, and Amako's mother was a key figure in its creation, until it was deemed to dangerous and sealed.This is just pure speculation, but I am guessing that Usato is going to use the healing cannon to destroy the towa. I also think the towa was given to Jinya by the demons to tempt him with a sample of the foresight ability so they could ultimately steal the power for another demon, not to directly ally with beastfolk.