Upon further inspection of the crime scene, various letters were found near the victim's body. One in particular was written by Liesel and addressed to Rikuto,
I frequently deliver handwritten letters to my friends, so expect more letters addressed to you from me in the future. If these letters become a burden to you, please be sure to speak to me in private. I wouldn't want to cause you any trouble.
The main reason I wrote this letter was to thank you. I tend to panic during situations and it's nice to have someone so consoling around. You helped me during the black out, defended me during the execution, and comforted me after. The situation we're in is despairing, but you've managed to make me laugh and smile. I honestly couldn't ask for a better friend. Thank you, Rikuto Hisakawa. Tack så mycket.
The first time we met, you told me a lot about your profession. I want to be able to show you a secret talent of mine. I don't think I'm very good at it, but maybe you'd still be interested.
I tap dance and sing, and it would be an honor to preform for you."