Henselt

Henselt of Ard Carraigh is the king of Keadven and a major antagonist in game Witcher 2: assassins of kings. He's the last of House Unicorn after accidental death of his last son. He's known from hatred to non-humans, warmongery and short temper. For years he fought with King Demavend for land Upper Aedirn/Lormak.

At the beginning of act 2 of the game he meets with Prince Stennis to negotiate conditions of the end of their war. However the negotiations fail due to a curse that unleashed a demonic fog. It also postponded his invasion. Geralt of Rivia helps to break the curse him or his opponents. Depending on player's choice King Henselt can conquer Upper Aedirn or lose the war. In the former scenario player can also allow Vernon Roche to kill him.

In Witcher 3: Wild Hunt if Henselt survives the previous game, then is killed by King Radovid during conquer of Keadwen.