They will show up in most worlds as the "original" ML & FL, and every time they either die or have terrible endings. Even if sometimes they aren't evil, and just clashed a little with our MC.

The ori-FL is usually the "overly pure, cute, & innocent" type. It's no surprise she doesn't like MC who's an "arrogant rich girl" and have different life views

And because of that, the ori-ML who's only warm to her & cold to everyone else will also dislike MC

You can say this is a horror game and everyone have a chance to die. But it's the author I tell you! The author just hates them

She does have a bottom line though - hurting her parents & the goal to eliminate all of humanity. Because of that, the arc with ML being an evil AI has a bad ending. But he gets a second chance two arcs later.

ML: “I ate your heart, and I feel that you love me so much! Now you can never leave me or else you will die.” FMC: “Aww, you’re so cute. Okay, let me reward you by letting you “eat” me on the bed.”

Literally. ML just basically kills or mu*ders anyone not pleasing to the eye. I feel like in every chapter, FMC’s deskmate will report that half of the people at school disappeared, and there will be OBVIOUS rumors that they’re killed, but FMC has no eyes for this as all her attention is on her boyfriend. It’s already a great reaction with her if she responds to this surprising report by saying “Oh.” After all, she’s the girl who saw the ML eating a carcass with blood and gore all over him, wiping it off with gently, and then kissing him while they exchange I love yous.

ML: Does something heinously evil, killing people in terrible ways that they don’t even deserve to be killed. Gets found out by FMC, sobs softly and goes “Yaoyao, I love you so much!” FMC: Aww, he is so cute, uwu. I won’t forgive you, humph!” Then basically spoils him, and the two of them get immersed in their world full of hearts while ML either directly or indirectly kills people around them.