Ryuki appears to be strangely susceptible to the videos tied to the HB-Case. On almost every occasion, watching these videos trigger his dissociative episodes, alongside visual and auditory hallucinations, acute memory loss, and periods of catatonia or mania from minutes to hours. All this, in combination with his struggle to accept forgiveness from other people, lead him to spiral easily, and give him the appearance of being self-destructive and even dangerous.