Isekai where someone else knows that they isekai'd (spoiler for some of the series)

I’ve transmigrated into the body of the wife of the mad villain emperor in an angsty novel. How will I escape? By running away quietly when the saintess he’ll become obsessed with appears. This love-blind emperor won’t even remember that I exist once he lays eyes on the saintess. …But the villain emperor has asked me to return to the palace with him; not the saintess.
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○ : murder; violence; abuse

Valerie thought she’d be a genius mage after being reincarnated into this world. But when her magic can’t get past basic and her teacher shares a prophecy of a tiger coming,, she opts to enjoy an ordinary life. Everything’s fine until she’s engaged to none other than Duke Kylus Dwello.
○ /
○ Including MC and Jia here
○ : child abuse

After waking up as the villainess Liberata, the plot plays along despite her passiveness, and she is executed, only to wake up again. On her twentieth time through, she ends up changing the plot by sleeping with the male lead and is forewarned by an old fortune teller that if the plot is not remedied, “[the] entire world will cease to exist.”
○ ( A minor character, but one whose knowledge of her being from a different world is crucial to the story)
○ TW: self-harm

thought it was a pretty good deal to die unjustly, as a payment for the price I paid for being the villainess. Until I realized that I couldn’t escape the original plot.
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○ : child abuse; domestic abuse (these two include a lot of types: physical, emotional, neglect, starvation, isolation, etc.); kidnapping; self harm; possibly alcoholism at the end/in the side stories

I was given slime as a gift from my war-crazy brother.
At first, I decided to keep it under the bed and raise it secretly, but I grew to befriend it. I would talk to if day with all kinds of secrets to my first-time friend.
Everything from the fact that I am the possessor to the content of the original.
“The male protagonist, Alexey, was amazing.”
At my words, the slime’s blue body glowed red.
○
○ : domestic abuse; child abuse

I found myself embodied in an otome game. The problem is that I am not the heroine, Nyla, but the villain, Claudia. In a desperate move, I propose a contractual marriage to the cursed prince to get his help, but he takes his role as my husband too seriously…
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○ She tells a guy, and it’s not explicitly stated whether he believes her or not, but I’m pretty sure he’s inclined to believe her. Additional character, too, but that’s going into spoilers.