I love the theories, really excited to see what route our mysterious fifth member will go. Seems like she may have either been like an adopted sister/relative, or maybe a childhood friend of Aizawa
Also WOW the pendulum detail, I never noticed that. Goes to show Dorothy is hiding so many details and foreshadowing, it’s really nice to see an author with a plan sometimes.
Since Michi’s mom has star and moon symbols on her shrine, and Michi seems to be all about stars with the MA(?) mark on her neck, I wouldn’t be surprised if the moon pendulum used to be Michi’s or Michi’s mom’s item.
Also, how Sayaka can act so normal and calm while her girlfriend has a ripped hole through her, I don’t know