So, I mentioned in the facts that Kira suffers from nightmares and has mental health issues due to trauma. Kira has a type of split personality: one shaped by Illumi, and the other that emerged after Gojo took her in. I don’t know if you remember, but in one chapter when Kira lost control and almost killed Maki, later Gojo and Illumi were talking. Illumi said that Kira losing control is normal and that he’s not surprised because he had instilled the craving for killing in Kira’s soul since she was a child.
Deep down, Kira—the personality shaped by Illumi—loves killing. She loves blood, just like a Zoldyck member: ruthless, cruel, and doesn’t care about anyone else. Lately, after Illumi tried to take her back and Gojo stopped him, Kira’s mood and her old personality started to show a bit at night. Gojo became worried that Kira’s Zoldyck personality might fully take over and turn her back into the emotionless killing machine.
So, he talked to Shoko and started secretly slipping some pills into her drinks and food to help keep her mental health in check and to stop her nightmares. The nightmares are actually the other Kira—the Illumi personality and the one speaking in Kira’s head is also the Kira shaped by illumi. No one can handle her when she comes out fully except Illumi. When she does take over, it’s very difficult for Gojo to deal with her, he just has to knock her out and give her the pill, hoping she wakes up as the “other” Kira, the kind kira
This will come up in later chapters. I hope this makes sense!
