Butterfly Key is the name of two separate keys in Fatal Frame II: Crimson Butterfly and Fatal Frame III: The Tormented.
Fatal Frame II: Crimson Butterfly[]
| Butterfly Key | |
|---|---|
 | |
| Japanese name | 蝶の札鍵 |
| Romaji name | Chō no fuda kagi |
| Item type | Key |
| Description | A key with a butterfly engraved. Was in the doll stand drawer. A butterfly design is carved on the wooden key. |
| Purpose | Opens the door in the Entrance of the Kurosawa House |
| Location | Kurosawa House, Doll Stand Room |
| Variants | N/A |
| Appearances | Fatal Frame II: Crimson Butterfly |
This key first appears as the key to open the door in the Entrance of the Kurosawa House.
Fatal Frame III: The Tormented[]
This key is used to unlock the door in the Barred Hallway.
| Butterfly Key | |
|---|---|
 | |
| Japanese name | 蝶の鍵 |
| Romaji name | Chō no kagi |
| Item type | Key |
| Description | A key engraved with "Butterfly". It was kept in the back of a room that looked like a library. It's a(n) small old key, engraved with a butterfly pattern. Maybe I can use this to open the door where Mio disappeared... |
| Purpose | Unlocks a door in the Barred Hallway |
| Location | Library |
| Variants | N/A |
| Appearances | Fatal Frame III: The Tormented |