Han Cunningham was known as a hero who fought on the front lines for the Highland Kingdom. During the war between Highland the City-State of Jowston, he was a close friend and personal rival of Genkaku, who fought for the City-State forces. Around this time, the two friends would come across the split Rune of Beginning and Han would inherit the Black Sword Rune. Respecting each other's abilities, their war would end through Darell's conspiracy and Genkaku would fade away while Han was lauded as a Highland hero.
As he grew older, Han was appointed Commander of the 2nd Highland Army and assigned to the defence of Highland's Imperial Capital, L'Renouille. As such, he did not see action in the Dunan Unification War until its last battle, when the city was besieged by a numerically superiour New State Army. After L'Renouille was breached, Han would make one final stand in L'Renouille Palace, duelling the New State Army's leader, Genkaku's adopted son.
Defeated, Han would reminisce one last time about his days with Genkaku before passing away serenely.