What Should I Do? I’m an Invincible Reincarnated Cannon Fodder Heiress

Villainess, Misunderstandings, Invincible, Witch, Light Girls' Love I am Yumili Thomas, a black-haired, straight-haired, taciturn villainess. At three, I unexpectedly gained a stranger's memories and learned my fate: offend the royal family, be stripped of my status and made a commoner, then exiled to Siberia to dig potatoes, where I would eventually freeze to death on the snowy plains. To rewrite my death sentence, I trained relentlessly from childhood. At four, I honed my combat skills; at five, I studied forbidden black magic; at six, I cleared the forest of slimes; at seven, I flattened a goblin den; at eight, I ventured into the deepest dungeons; at nine, I volunteered for training in Siberia and casually slew the Lord of the Snowlands. Still unsatisfied, at eighteen I went off to solo the Demon King's castle again and again. Only when I looked back did I realize I'd already become invincible. I could swim through lava without a scratch, the freezing wastelands felt like my backyard, and the punishment of exile was meaningless to me. Now that I'm invincible, I just want to have fun and thoroughly torment the protagonist's party. The empire's second prince has fallen for a commoner heroine who wields light magic? I'll set them up, and I'll do it properly! Let's make the royal family lose face. The empire's third prince and the chancellor's son are also in love with that commoner heroine? I'll fan the flames, and I'll do it properly! Let them beat each other to a pulp. The empire's fifth princess is a fox-eared brat? Always provoking me with that unbearable arrogance? A gut punch! I'll give her a thorough gut punch! Even if I'm sent off to Siberia to dig potatoes, I'll still give her a thorough gut punch!