MTL - Gou Became a Martial Saint In Another World - Chapter 3 Hard to survive

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet."
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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Achieving the power to create virtual worlds.

To expand his world, he needs to devour other worlds.

As such, the world ushered in the most greedy, sly and terrifying existence in the world ——— The Gamer

- Description from Novelupdates

Lambert, one of the great generals from Regios kingdom was suspected for planning a rebellion against his lord at the end of unification war, he died an unnatural death. Two hundreds years later, when the era has changed and Regios kingdom entered it’s peaceful era, he accidentally revived as a demon called Undead Knight.. Lambert whose entire body was wrapped in a flashy Demon Metal[Organ] set out on a journey to punish the wrongdoers while enjoying the peaceful sight of Regios kingdom. But…….. This peaceful era was basically an easy mode for Lambert, the greatest general of the chaotic era.

I possessed an extra character who is a villainess in a novel.

I tried to live a quiet life without getting involved with the main character.

“If you run away again, I’ll tie you up and take you to the palace.”

The second prince, who only looked at the original heroine, is obsessed with me.

“I didn’t do it for you, so don’t get me wrong.”

My self-proclaimed rival seems to have a crush on me.

“Ahh! She’s so beautiful!”

“If only I had been hit by her magic once!”

Suddenly, there is a fan club.

“Come, let us all pray reverently while looking at the picture of the noble Yerine.”

My favorite heroine became the president of the fan club.

…… Am I really the villainess?