In the MCU/Marvel with the Omnitrix/Ultimatrix - Chapter 33: The Gala

Lynn traversed the multiverse and was reborn as a half-blood devil.Fortunately, he awakened a system that allowed him to...

“...is that the end for me?”His eyes closed, accepting his fate. He thought it was the end. However, it was not.When Liam awoke from the endless darkness, he found himself in a world much different from his own―and in a body that was unfamiliar.“...[ The Golden Hero ] This is...”It seemed that he was given another chance at life. No longer as Liam, but as Rowen, a character from a novel.But, there was a slight problem.Rowen was a villain. A secondary villain at that.His fate was to be manipulated by the antagonist and killed by the hero.It was a tragedy. What could he possibly do?Of course, not wanting to let fate decide for him again, he took up his arms, stopping at nothing to prevent his tragic death.He had to survive in a cruel world where fate was not in his favour.If it meant killing the protagonist, the crown prince or even the main villain; he would do so.All so that he could live the life he wants.

Lyle Walt is a young noble boy and heir looking forward to the day he can inherit his family’s territory. Except around when he was 10 year old, his parents started neglecting him more and more in favour of his little sister, Celes.
On his fifteenth birthday, he is challenged to a duel by his sister to see who will inherit the household and horribly loses, being cast out of his family. Afterwards, he gets treated by the family groundskeepers and receives the family heirloom Gem from him that Lyle’s grandfather had entrusted to him. From there, he begins an aimless journey with his childhood friend and former fiancée, Novem, and the Gem-turned-Jewel that houses the memories, personalities, and Skills of seven of his ancestors.