Likely named for his 22nd century ancestor, he was the illegitimate son of Duras, kept in the custody of his aunts Lursa and B'Etor. In late 2367/early 2368, Toral was used by his aunts in an attempt to gain control of the Klingon Empire. After it was revealed that the House of Duras was receiving help from the Romulans during the Klingon Civil War, Toral's claim was severed, and he was convicted of treason. Gowron offered to let Worf kill the boy, but Worf refused, unwilling to kill him as he was only a pawn of his aunts. (TNG: "Redemption", "Redemption II")
Toral attempted to take over the Klingon Empire again in 2372, this time on his own, as his aunts had been killed in the Battle of Veridian III the prior year. He met the Dahar Master Kor on Torna IV, where Kor drunkenly told him he had discovered the Shroud of the Sword and that it would lead him to the Sword of Kahless. Toral sent Soto, a Lethean, to probe Kor's mind on Deep Space 9. Using the information Soto retrieved and in believing that if he could wield the sword he could take over the Empire, Toral traveled to the Gamma Quadrant. However, Kor, Worf and Jadzia Dax had already discovered and retrieved the sword and managed to escape Toral and his henchmen. The sword was later jettisoned into space, thwarting another attempt of the House of Duras to conquer the Empire. (DS9: "The Sword of Kahless")
In the first draft script of Redemption, his name was Tardat.