Now this image is full of references: - First time Cover corporation logo is seen (the triangle is hollow inside, so it's not hololive's logo) - The books on the bottom left has the same heart symbol as on Marine's eyepatch, next to it has a crescent moon, possibly Luna's kingdom? - The white feather in the glass container on the right, either an angel's (Kanata) or Subaru's - The damaged knight's helmet, the same design we have seen throughout this series - The other part of the mural we didn't see in Pekora's entry post #5653591 - Broken chains and stick (spear?) on the floor seems to resemble the ones in Aloe's entry post #5676285
Also the blue jewel on Mel's bracelet seems to be a recurring theme too, similar jewels have shown up on Marine's monther's necklace, Pekora's necklace and Haato's ring