I personally like to think picrel is one of the things Mari said the night she died. Maybe even one of the last things she said after getting in Sunny's way. Referring to the broken violin. With how oppressive this room is, especially after the toast start to change into Mari and then into these things, it feels like something that would be echoing in Sunny's nightmare. Twisted version of Mari telling him to look at what he did, but referring to her. Look at what he did to her.