Strong Female Side Character Awakens - Chapter 166 - Here to Help You Torture Scum

Crossing into the world of Naruto, and acquiring the One Piece system, with all the powers of the world of One Piece, swordsmanship, devil fruit, domineering.

-Do you think that your fire is very powerful? I have the burning fruit.

-Do you think that your thunder is very powerful? I have a thundering fruit.

-Do you think that your otter is very powerful? I have the frozen fruit.

-Did you said you want to die? Don’t worry, I also have a nickname: Death Doctor.

- Description from Novelupdates

She was originally an assassin. After rebirth, she was reduced to another world’s Di family’s most inferior concubine-born daughter. With an extremely hideous appearance and no way to cultivate, she was the object of everyone’s humiliation and bullying.

However, the timid idiot turned over a new leaf. She took control of her own fate and became a domineering, fierce, and demonically beautiful girl. She became a shocking talent and stunning figure in the world, returning blow for blow, blood for blood. With a kill, she became famous!

Even for the smallest provocation, she will take revenge. If someone bullied her, she will return it tenfold! Even to the heavens she will not be merciful! Controlling the mythological beasts of the world, she broke through the Ninth Heaven and shook the whole world!

She freely opposed the heavens. Provoking numerous evildoers, Di Fuyao could only pretend that she was timid and easily bullied with a low IQ, pleading to be let off!

Who knew that the man she provoked, the cold and arrogant evil Ghost Emperor, actually brought the whole world to her just to marry her…

- Description from Novelupdates

My name is Joelson, and I traversed across the world. I arrived at a continent of sword and magic and became a noble sorcerer.

Felix Ariel, a typical Floridian, found himself transported to a mysterious kingdom in another world. However, a misunderstanding led to Felix accidentally killing the king, resulting in his untimely demise.Following this tragic event, Felix's spirit encountered a mysterious being who identified as Felix's ancestor. This entity claimed that Felix had been cursed by an unknown individual. For Felix's safety, the ancestor bestowed upon him a system for self-defense.Upon returning to Earth, Felix realized that he would be transmigrated to the alternate world at noon due to the lingering curse. To prepare for this unexpected transmigration, Felix relied on the system, which required him to gather oil and gold to enhance his abilities.Thus began Felix's quest in the other world. With his system, he brought firearms and an ambition to spread liberty... for prosperity and freedom.