MTL - Machine Storm - Chapter 437 pioneer

Following a brutal and tortured death, a former assassin, known only by his codename Kuro, is given the opportunity to reincarnate in another world, a world with magic and monsters. Armed with an unrivaled healing factor and an inhumane pain threshold, Kuro opts to go for a reckless direct approach in this world instead of a stealthy and cautious one, and as a result, slowly gains attention bit by bit.

Having previously been a loner in his old life, he interacts and befriends people for the first time in his existence, however, his blunt nature also sees him making just as many enemies, both big and small. By combining his old assassin skills with the magic powers of this world, along with his high resistance to pain and rapid regeneration, he doesn't take long to establish himself as a formidable force in this world.

Initially, Kuro only faces minor threats, like weaker monsters and bandits. But before too long, the threats slowly but surely become more and more severe…from Zombies to a bloodthirsty empire to Vampires and Demons, and even divine beings…however, as the enemies he faces grow stronger, so does Kuro, gaining rare powers that have never or rarely ever been seen in this world…

She, a modern hidden ghost leader of an organization which gathered insane prodigies proficient in the various differing skill-sets. Highly skilled in medicine and poison, executes covert assassinations, viewed as insane and demonic in the eyes of people of the world. Killed in an accident, and reborn into the body of a disfigured young girl.

What? Face disfigured, identity stolen? A return to the family dim and hopeless? Her identity can be given up, her family can be forgone, but as for the one who harmed her predecessor who inhabited this same body, if she didn’t at least make them scream in unimaginable agony and throw them into a state of wretchedness, how could she live up to her demonic reputation? Endless turmoil ensues and it’s a battle to dominate over all! See how she shook the world dressed in a suit of red, her sword up against the dominant powers that rocked the Heavens! Her name spread across the seas, shocking the earth!

- Description from Novelupdates

“What?! I turn into a little cat… at the end of the world?”

Kate looked at her small limbs with desperation. She glanced at the others who awakened strange and powerful abilities while she turned into a small cat without any combat ability.

She wanted to cry.

Thankfully, this small cat has an owner. Her strict professor who looked cold and unfeeling.

With no other choice, Kate can only follow him.

…

Kyle looked at the little cat in his arm who showed an innocent look.

Have you ever seen a cat acting coquettish after stealing food to hide her guilt?

Have you ever seen a cat take a bath so happily?

Have you ever seen a cat… turning into a little kid?

.....

Looking at the cat eared little girl with cute tail, Kyle sighed and decided to become the girl’s father and taught her the way of the world.

But when cat eared little girl suddenly grew up into an adult… Kyle fell silent.