Rage Shirogane no Ishi: Argevollen : Season 1 Episode 11

As the 8th Unit heads back to headquarters, Brigadier General Cowen of the Arandas Army nonchalantly informs Samonji that Arandas is slowly losing the war, Tokimune is the younger brother of his late subordinate Reika, and that the Argevollen was originally meant for his own use.