The Lion-Headed Kannon is used by Chiyo as a means for using the Sealing Technique: Lion Closing Roar. It is kept inside one of the puppets from the Puppet Collection of Chikamatsu. It starts out as a small ball that can be held in one's hand, but when thrown grows out into a man-sized lion's head with numerous large fangs and its mouth wide open. If aimed correctly, the tool will pin the target against a wall with its mouth, making them unable to move.
Kannon (観音, Chinese: Guān Yīn) is the bodhisattva of compassion.