Ḥet (ח) aka chet, is the eighth letter in the Hebrew alefbet. It most commonly represents a barrier or ladder.  Its gematria is 8.

Ḥet is pronounced in a guttural way that is unusual for most English speakers, as seen in “Bach.”

Ḥet in ‘Milhamah’ comic

The Ḥet foundational glyph briefly appears behind Shemin a panel in Update #8. Outside of that, its physical location in the Milhamah universe is presently unknown.