I'd like to add that a battlefield commander, regardless of country, is very unlikely to march into the front lines due to 1) their leadership being necessary for the military to work, and 2) they are exposing themselves to the opposing military force, who WILL seize that opportunity for a "decapitation" (killing the leader to put the rest of the forces into disarray). Part of the reason Ukraine has been able to go toe-to-toe with Russia in the Russian invasion that began February 2022, despite Russia having a numbers and (initially) a weapons advantage, is because Russia's military likes to send their generals out into the open, where snipers and long-range artillery on the Ukrainian side pick them off. Top Russian general Valery Gerasimov was nearly killed when he personally visited Ukraine, intelligence found his whereabouts, and an artillery strike was launched at his location. (Gerasimov's deputy, who was standing next to him, WAS killed, as were a large number of the soldiers accompanying him.)
The only times any competent military in history has had their commanders there with the soldiers, it's for morale, and they remain in the back. This held just as true for feudal Japan as any other time and place. A shogun that stood up to fight in battle directly was a shogun who would soon be dead. A smart shogun would sit in a hidden location somewhere and command from there, not stand out in the field (and anyone dumb enough to stand out there would be dead before getting promoted to shogun).
Kingambit is based on a Japanese Samurai commander, and its pose is based on a commander sitting on their camp stool. This is reflected in both its Pokedex entries as well as its Ability (the Japanese name of which, Sodaisho, is a term applied to highest-ranking Samurai commanders), and there's a clear visual comparison to be drawn between Kingambit and things like the statue of Shingen Takeda in Nagano (though I'm sure there are other examples as well).
Also reflected in its stats: Kingambit is the slowest Pokémon in its evolutionary line.