Anime
- Episode 47: "The Door to Nightmares" (flashback)
- Episode 50: "The Rose Mansion" (flashback)
- Episode 56: "The Never-Ending Journey" (flashback)
- Episode 57: "That Night" (flashback)
- Episode 61: "The Door to Memories" (flashback)
- Episode 64: "The Baby's Depression" (flashback)
- Episode 66: "Welcome Back" (flashback)
- Episode 67: "I'm Back" (flashback)
- Episode 68: "Ruhenheim" (minor appearance)
- Episode 69: "The Peaceful House" (minor appearance)
- Episode 70: "The Town Massacre" (minor appearance)
- Episode 71: "The Wrath of the Magnificent Steiner" (minor appearance)
- Episode 72: "A Nameless Man"
- Episode 73: "The Landscape of the End"
- Episode 74: "The Real Monster" (flashback)
Manga
- Volume 11: The Dead Angle
- Chapter 8: "The Door to Nightmares" (flashback)
- Volume 12: The Rose Mansion
- Chapter 6: "The Unopened Door" (flashback)
- Volume 14: That Night
- Chapter 3: "The Puppet Master" (flashback)
- Chapter 4: "The Children of the Recital" (flashback)
- Chapter 5: "That Night" (flashback)
- Volume 15: The Door to Memories
- Chapter 6: "Nina's Memory" (flashback)
- Volume 16: Welcome Home
- Chapter 6: "Footsteps of Terror" (flashback)
- Chapter 9: "Mother and Father" (flashback)
- Chapter 10: "Welcome Home" (flashback)
- Volume 17: I'm Home
- Chapter 3: "Ruhenheim" (minor appearance)
- Chapter 4: "A Quiet Gunshot" (minor appearance)
- Chapter 6: "The Town of Suspicion and Fear" (minor appearance)
- Chapter 8: "The Peaceful House" (minor appearance)
- Chapter 9: "The Town Massacre" (minor appearance)
- Chapter 10: "Memories Not to Be Forgotten" (minor appearance)
- Volume 18: Scenery of the Doomsday
- Chapter 1: "A Fabrication" (minor appearance)
- Chapter 2: "The End of the Vacation" (minor appearance)
- Chapter 3: "Grimmer's Cry" (minor appearance)
- Chapter 4: "The Wrath of the Magnificent Steiner" (minor appearance)
- Chapter 5: "A Nameless Man"
- Chapter 6: "Pictures That Can't Be Drawn"
- Chapter 7: "Don't Cry"
- Chapter 8: "Scenery for a Doomsday"
- Chapter 11: "The Real Monster" (flashback)