The Mercenary who was Reborn as a Neglected Noble Princess

Riley Curtis, it’s me. I’m a mercenary who is wanted by Interpol for assassinating a superpower official. My act is famous almost all over the world. In my old age, I ended my job by killing a corrupt prime minister. However, it all came to an end when I met a child I had rescued many years ago. I died on the spot after he shot me in the head.
I thought that the angels would punish me until the day of judgment. However, when I woke up I had become someone else. A weak and neglected noble princess. Riley Gallagher.
A system and a little fairy guided me through life as Riley Gallagher. Being Riley Gallagher wasn’t as bad as I thought it would be. Food and clothing were available. Although it wasn’t very good. It was still better than when I was a soldier.
However, this world was no different from the world I was living in. Corrupt officials, law enforcers who don’t enforce the law fairly, and wars that are only for personal gain. The difference is that in this world, fantasy creatures always show their existence and disturb humans.
What’s the point of me living again if my life is not far from my old life? To hell with it all. I must become a ruler and improve the world.
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The book cover is not mine, I will remove it if requested.