The name of Chiyu's remnant soul, meaning Purge Filth. It is a spirit rather than a human soul, which fell onto the old pagoda tree approximately two hundred years ago. The remnant soul was so broken that it could not remember when it fell. It was nurtured by the spiritual energy from its own aura within Huai An's tree body. After being recovered and repaired by Chiyu using the Soul-Chasing Disk, it agreed to merge back with Chiyu.
