My Fiancée Is A Villain Witch Destined To Die

"You know, Yvette, the daughter of the Duke, is the brightest pearl of the empire. Even the best bards cannot describe her beauty!"
"Now, she will become your fiancée!"
"Then I really thank you."──Lin Ang said desperately to his father.
This is the world of the Western fantasy game "Saint of Light", and his fiancée is the villain in the original game.
The game has a total of 100 different endings. Yvette achieved an impressive record of 100 deaths and 0 survivors, and was nicknamed the Legendary Master of Death.
Looking at the villain fiancée with death flags all over her body, Lin Ang had only one thought in his mind:
"Run away!"
...
Lin Ang was still unable to escape from his fiancée's claws after all, and was mercilessly eaten on the wedding night (sorrow)!
At this point, we can only rely on our rich game experience and mastery of the subsequent plot to avoid those 100 death endings!
"What? You asked me how to avoid it?"
"Wouldn't it be better to kill all the guys who might hurt my lovely wife?" (showing hands)
"Yvette, this is how I love you!"
...