The problem here is that it isn't exactly like any of the other spin offs. people on the fourth period don't retain their memories, and as far as we know none of the characters in the spin offs have been main characters from evillious (there is of course amostia, but he was split up into two different characters)
This is a direct continuation with all of the characters retaining their memories and traits, and it's very much so a continuation of their character arcs. and with the seeds planted in the clockwork lullaby album and the implications of the court ending we'll probably have another situation like it at some point. It might be better to figure out something new for it, or at the very least figure out how we want to handle character pages for the evillious characters involved in these spin-offs