Zero Unit

The Zero Unit is a mysterious symbol that is often identified with the mythological "Keter" of the Sephirot. It appears on Calumon, Sakkakumon, Gallantmon, Gallantmon Crimson Mode, and Gallantmon's Aegis. The symbol takes the shape of one large triangle formed from four smaller ones. An inverted Zero Unit also appears on Guilmon's snout.