Multiple Mezu and Gozu appeared.
A pair of Gozu and Mezu watch over three bank robbers in a cemetery, where they appear as floating transparent images after the leader shoots Kitarō, who disappears afterwards. Another pair witness Enma Daio wrince in pain as Yato-no-Kami starts overpowering his seal.
Four Generals of Jigoku Arc
Mezu appears alongside Gozu out of the flames of the portal created by Enma-Daiō to re-incarcerate Ibukimaru. The two watch as the Kidō is chained and pulled closer to the portal, soon the three disappear along with the portal.
Powers and Abilities
Dimensional Vision: Gozu can watch over criminals from Jigoku, appearing as floating transparent images of themselves, invisible to humans.