/- Psychosis refers to a collection of symptoms that affect the mind, where there has been some loss of contact with reality. During an episode of psychosis, a person's thoughts and perceptions are disrupted and they may have difficulty recognizing what is real and what is not. -

Sanzu was diagnosed with it a while ago. He ended up leaving the gang he was in because it hindered his ability to fight, and has since become reliant on you. He's afraid that you might not actually be real though..