Elemental Orbs are the pure manifestation of their respective elements. The science behind their existence is largely unexplored, but it is thought that they are actually tiny pockets of reality, most commonly created as remnants of hasty elemental manipulation.
Though these are ordinarily fragments of elemental divination such as geomancy and pyromancy, the Kitsune do have a limited ability to create these in which to store the sheer essence of their element. Outside of their Kitsune Realms, they are known to use these to draw and channel their pristine elemental powers; within their realm, they tend to be a little less useful for this purpose.
Over the course of his journey, Mr. Tofu finds that he is able to absorb the properties of these elemental orbs in order to change his color, form, and elemental affiliation.