|Japanese name||あいば いおり|
|Romaji name||Aiba Iori|
|Cause of death||Luna Sedata Syndrome/Blooming|
|Encountered in||Rougetsu Hall 2F Ward (Chapter 2), Haibara Hospital 2F Ward (Chapter 8)|
|Family||Takashi Aiba (Older Brother)|
|Appearances||Fatal Frame IV|
|Jap. voice actor||Unknown|
Iori Aiba is the younger sister of Takashi Aiba. She suffered a minor case of Luna Sedata Syndrome and visited Rougetsu Island with her brother while he was researching there. Iori was hospitalized in 1970, after witnessing the failed Rougetsu Kagura, causing her to contract the disease.
The door to Iori's room cannot be opened, due to the doorknob being broken by her so she wouldn't have to go outside.
- Iori's room is #204 (Ingetsu; "shadow moon")
- Iori's hidden ghost can be found by photographing the door to her room.