The E.G.O or Electronic Ghost Operator is a device that looks very similar to a Nintendo DS. It is used by Soul Smiths for a variety of purposes. It can be upgraded by purchasing modules which has different functions that can help Soul Smiths of all skill levels.
At the time it was received, the E.G.O. had three in-built modules which are Renew, Dilute, and Distill. Along with those it has a portable Humor Reserve to easily store humors collected.