The “fifth power” Shinigami mentions in Chapter 96 that they are planning to bring to the moon battle is Maka’s mother.
Just a hunch.
Cause she’s prolly useful… Maybe….
My second guess would actually be Free, but Ohkubo’s a giant ass jerk for forgetting about such a flawless POWERFUL character…
^^^^^^^^^^^^^^^^^^^^ ****Adding my opinions to this beautiful post because of reasons**** There’s a soul eater head canon that thinks Maka’s mom is a witch Deep in my heart, I wish this to be true. She’d be like the good witch from the wizard of oz, but she’d also be a hardcore fighter and badass and clean up all the shit the shibusen humans are too incompetent to pick up So yeah if she’s the 5th power i’d be way too happy
plus, what’s Free doin’ tho like this whole rush for madness and power thing is happening without him. he was there from the beginning before the kishin cat was even out of the bag you know mang if I were Free i’d feel seriously left out