|Family||Miku Hinasaki (owner)|
|Appearances||Fatal Frame III: The Tormented|
|Jap. voice actor||Unknown|
Ruri was given to Miku as a "gift" from her deceased parents. When she is not at Miku's side, Ruri is wandering around Rei Kurosawa's house. She acts as a kind of ghost detector, because she sometimes notices that things aren't quite right in the house before Rei or Miku do.
It is possible to play with Ruri by pressing X next to her and then O. In response, Ruri may sniff Rei's hand and stroke it affectionately or paw at it. A small oddity in the game is where Ruri is in the Altar Room; if Rei opens the hallway closet, Ruri will suddenly leap out from above.
- Her name means "lapis lazuli".