The MC struggles with expressing emotion (so not quite emotionless cause she still has them) but when she makes physical contact with the ML she can feel emotion.. better/easier? And the interactions the MC has with her test subject friends is pretty funny and cute.

Then there's also this weird side plot where the MC looks like a dead relative of a nobleman. Like it doesn't make any sense??? Unless she has an actual connection to the dead relative (like being a long lost secret love child or something) explaining how/why she ended up on the streets in the first place then I'd understand why they added that but, it's kind just.. there? like a lot of things in the novel really. Though, I think the author just put it in there so the MC catches the attention of the knight guy giving them a reason? to interact.

The MC is a poor soul who had no parents at a young age and lived in the slums. She was sold and was used as an experiment, later having super powers. The MC is not a Mary Sue, she's a level-headed, cool woman who will only panic inside her head (though that also rarely happens) when there's trouble occuring.

Yuri is written to be an emotionless character, literally. However, whenever she makes physical contact with the male lead, Lakis, she suddenly gets all of her emotions back. Since Yuri likes the sensation of getting all her emotions back she touches Lakis' hands and body with any opportunity she finds which is honestly creepy behavior. Keep in mind that she starts engaging in this type of behavior within the first week of meeting Lakis while he is heavily injured and unable to move. Lakis also feels some kind of way whenever Yuri touches him similar to some kind of marijuana drug, so he welcomes the physical contact as well. I'm sure this is all going to be explained later in the story but right now it's just a ridiculous excuse for the two leads to get all touchy-feely with each other. What if this had happened with another male character? Would she have garnered feelings for them instead if they had this mysterious phenomenon to help them out?

This issue is even brought up by Yuri in chapter 71, but of course it's all glossed over once they start getting some steamy action five seconds later. If Lakis had appeared in front of the heroine's door he would have fallen in love with her like he did in the book, but because Yuri had taken care of him instead all of those feelings were pushed onto Yuri. I also find it strange that other than Lakis, the three other male characters are having romantic feelings for Yuri as well despite her having no discernible personality whatsoever. These other male characters only started interacting with Yuri because she coincidentally happened to look like a dead person they used to know. See the pattern here? These characters have some kind of "reason" to love Yuri whether it is because of a mysterious phenomenon or because she looks like their friend's dead mother. The author deems these plot points necessary to move the story along because otherwise, Yuri would probably be living forever alone due to her distinct lack of personality.