Some helpful context/theories that someone posted on twitter (here and here ), slightly reworded and very reformatted:

• Coco crying in her sleep - The initial incident
• ...While hugging the Haaton doll - Her taking a bullet for Haachama, or the fact that she was suspended along with Coco
• A shark doll in the background - Gura dedicating her karaoke of "Judgment" to Coco
• Fox (not a dog, not a cat) doll - Fubuki tweeting about visiting Coco and receiving backlash for it
• The others present - The rest of Gen (Towa, Luna, Watame, Kanata) by her side, no matter what.
• Sheep pillow - Probably just maintaining continuity from Day 2, unless Watame did something I wasn't aware of.