Here is interesting content and lore highlights regarding this title: Core Lore & Hidden Meaning
is a critical "bridge" OVA that connects the conclusion of the Epic of Remnant (Part 1.5) to the start of Cosmos in the Lostbelt (Part 2). It explores the "Lost Room"—a space in Chaldea where one can find what was lost, or those who have been lost. Fate/Grand Order: Moonlight/Lostroom
: A major highlight is the deep dive into Olga Marie’s psyche. Despite her death in the first Singularity, she appears here to share her perspective on the protagonist, Ritsuka Fujimaru, and her own resentments regarding her lack of Rayshift compatibility. Here is interesting content and lore highlights regarding
: It is described as a boundary between dream and reality, produced by the Chaldea Summoning System. It exists in a corner of Chaldea where the light of the moon shines through, serving as a space where "dead people" or their reflections linger. Despite her death in the first Singularity, she