From the previews:
War Keeper Caurus is the Thonian Emissary to Starlight Morvia. Caurus is soldier first and politician a distant second. Bequeathed the massive cuirass ‘Formidable’ by the most gifted Forgemaster in the galaxy; his brother, Ordhren Lar, Slodan Ord. War Keeper Caurus is a Thonian Commander Option.
The Warhound Riders were the first Ordhren units sent to trakk and capture Thonian Core Runners trapped behind lines after Ord razed the Acquiry hubs in the East.