Red's pose when she is first left alone with Adelaide in the living room (hands cradling her cheeks, head tilted to her right, staring with lips slightly parted) is identical to Yuno Gasai's iconic pose in Future Diary (Mirai nikki). As Yuno is a defining character for the yandere archetype in manga and anime, a personality defined by homicidal stalking behaviors and obsession with a single individual, this could well have been a deliberate reference.