Previews of the arc were first shown on a livestream hosted by Keiichi and Mion's voice actors. The official 07th Expansion Twitter account stated before the airing of the first episode that "from here, it's really a Hinamizawa that no one has ever seen".
- Rika Furude
- Keiichi Maebara
- Rena Ryuugu
- Mion Sonozaki
- Satoko Houjou
- Shion Sonozaki
- Kuraudo Ooishi
- Jirou Tomitake
- Miyo Takano
- Akane Sonozaki
- Kiichirou Kimiyoshi
- Kyousuke Irie
The manga version of this arc is much different:
- The scene with Rika and Hanyuu in the Sea of Fragments is not shown. Instead, the arc begins with Rika going through several more death loops:
- The first loop Rika goes to has her heading to the Sonozaki main house with Kiichirou. A deranged Akane decapitates him and then Rika.
- The next loop is Rika being drowned by Kiichirou in the swamp.
- The third loop is Rika restrained in the Sonozaki torture chamber as Shion tortures her.
- A fourth loop is Keiichi's mother killing Rika, with Keiichi and her husband also dead.
- More loops are displayed: Kasai kills Rika and the school kids find her, Oryou disembowels Rika, Rena goes crazy and chops up Rika's corpse, and Mion shoots Rika with her gun.
- 07th Expansion's Twitter account https://twitter.com/07th_official/status/1347118879722532867/1311690498168426497