When the war-hero, and, eventually, war-failure woke up once more after dying for their cause, they knew that once again they had reincarnated. In a rage, they struggled weakly against the bonds of fabric holding them, wanting to be anywhere but there, and suddenly, with a crack, they vanished.
The war-hero-turned-baby soon realized that they were on a darkened street of some form and quickly used their natural energy, their Chakra, to transform into an adult in a puff of smoke.
Eyes still unseeing, far off as memories of their world burning before their eyes entraps their attention, the war-hardened baby walked forwards, glancing around at the many random objects. Jumping when a large metal object on wheels flew past, they stopped and looked around.
Big buildings with an odd square shape, random technology that she couldn't quite understand, and many, many people walking around and chatting.
It took only a few seconds for the baby, who decided to call herself "Red" for the time being, though that was not her name and never would be, to figure out that she hadn't been reborn in the same world as she has the last two lives.
Wandering around a bit more, finally ending up on a bench, Red stared blankly ahead as foreign objects and sights filtered through her vision.
In her first life, she ended it prematurely, for she had been angry and went off the handle, killing tens of thousands of innocent lives.
In her second life, she tried to redeem herself by becoming a healer, a medic for others. She succeeded, but her deeds ended her entire world prematurely.
What would she do now? With her current luck, any actions she took would most likely end up killing thousands if not billions. After a bit more thought on it, Red gave a heavy sigh, shaking her head.
Both times she played hero and paid for it, honestly? Red was tired. She didn't want to watch her world burn, whether metaphorically or physically, and so, with a heart too old and too wise to feel heavier than it was, decided to -
Abruptly cutting off her own thoughts, Red quickly decided that, no, she wouldn't.
Red decided, in a split second decision, that she's have fun with this life, that she'd enjoy what little time she had, damn the consequences.
She then proceeded to call up Chakra-clones, aptly dubbed "Shadow Clones", and got to work getting some money and information.
By the end of the year, she got eighty three jobs, as well as eighty five different identities, one of which was her original form, and the last of which was the exact same identity used over and over to commit crimes for cash and information.
By the end of her second year in the world, she finished reading through all of the libraries in the "United Kingdom" and "Ireland", and had gained quite a lot of cash to buy a nice, quaint house with.
Many years pass, with the original body going through the motions of growing up, putting some universal coding- or rather, Fuinjutsu, as she sometimes referred to it as- on her clothing and clones, making them last longer and become a bit stronger, also never needing to be washed ever again, for the dirt, grime, and smells would all roll off of the all-black clothing as if it were oil and water.
Red was rather disappointed that her lauded and masterful fuinjutsu didn't work on herself or other living creatures, which sucked. Was there another universal coding language that was making fuinjutsu obsolete? She hoped so, or all of her hard work and many years of study would go to waste.
I figured I'd give you all an example of how it might go. I'm trying to make this more like One Punch Man than any overly helpful Mary Sue thing. As far as I planned, she'll only help the plot if she thinks it's fun or if it's entirely by accident, and most of her overpoweredness wouldn't exactly be from lack of effort, just from years and years of doing the same thing over and over again... Really Shadow Clones are OP, yeah? ... Anything you don't like or think I should change just tell me, it's all just a WIP