Named “Ruthless” Jack Tann
The Tan Colonel Grimm
He is a version of Happy Jack Grimm, just as experienced in strategy, but more ruthless, which could have given him an advantage, at the time, over the original.
This Tan version of Colonel Grimm is simply like the same original Grimm, only in favor of the Tan army, following orders from their leader, being a man of duty and a nationalist, who does whatever it takes to lead his nation to victory. He can be more violently tactical and ruthless as he does not possess the morals and ethics of the original Grimm.