Hallucination

A character with this trait experiences hallucinations at least once in the visual novel.

A hallucination is a perception in the absence of external stimulus that has qualities of real perceptions. Hallucinations are vivid, substantial, and are perceived as real by the one experiencing them. While visual and auditory hallucinations are the most common, other senses can also be affected. Hallucinations can occur due to the drug use, sleep deprivation or neurological disorders.

Hallucinations differ from dreaming, which does not involve wakefulness; pseudohallucinations, which are accurately perceived as unreal; illusions, which involve distorted or misinterpreted real perception; imagination, which does not mimic real perception, and is under voluntary control, and "delusional perceptions", in which real perceptions are given some additional (and typically absurd) significance.