he makes for the river and the gate is gone

It's easy to dissolve the mental barriers between himself and Agnian soldiers, independent of the Flame Clock, when there's a common interest - of course, agriculture is Zeon's passion, and he can communicate through its associated context with ease.

Isurd's inborn industriousness is like a language all its own; organization focused on results rather than a hierarchy of authority, and no room for forgetfulness. Everything in its tactical right place. All parts moving in awesome sync.

And of course, there's Isurd himself, who works straight to the bone and all but shocks the ever-earnest Zeon when he can get a laugh.