The cast is the game's main draw — twelve-plus characters with full voice acting and Live2D portraits, each built around a real cognitive disorder. This page lists the disorders that are confirmed in the public material, and is explicit about which names are not yet publicly verifiable.
| Character | Disorder | What the madness power does |
|---|---|---|
| Lain (萊爾) — protagonist | Synesthesia (聯覺症) | World Creation (世界創造) — makes others see his hallucinations |
| Reina (萊娜) — Lain's sister | OCD / 禁謊 (cannot lie) | Truth-bound, which makes her either the best witness or a liability |
| Character with hemispatial neglect | Hemispatial neglect | Hides the left half of the screen |
| Character with prosopagnosia | Prosopagnosia | Faces become blank — corpses read as faceless |
| Character with hyperthymesia | Hyperthymesia | Cannot forget, which makes their testimony impossible to dismiss |
| Character with Alice in Wonderland syndrome | Alice in Wonderland syndrome | Perception of the world shifts in scale and reality |
| Character with acropagnosia | Acropagnosia | Inability to perceive the acral — hands, feet — hiding detail |
Each disorder does three things at once: it is a real clinical condition, it is a gameplay mechanic that alters what the player can perceive, and it is a character-defining behaviour. Prosopagnosia is the clearest example — a face-recognition disorder becomes a horror-horror set piece, because the corpses in the cathedral stop having faces and the player has to track identity by other means entirely.
The result is that the cast is not a set of skins on one mechanic. Each Diseased is a different puzzle wearing a different shape, and learning to read a person's disorder is how you learn to read the room.
The game has twelve-plus characters and thirteen slots in the ritual, and the public material confirms the disorder set but not every individual name. We are not going to fill the roster with invented names. The demo — prologue plus Chapter 1, one to two hours, all thirteen characters present — is where you meet everyone, and the character list is the obvious page to send us a transcription of.