PMIM AU: Maiko shows up on Minami's doorstep one morning, looking to hire a burglar...
Please. Ocean's 11-style heist on a massive reserve of Grief Seeds held by Maiko's former boss, Momoko. Having been disillusioned with Momoko's policies, Maiko intends to steal her Grief Seed reserve and distribute it to the less successful groups in the area, a la Robin Hood. Unable to do this on her own, she recruits a group of Magical Girls to help her.
Minami (The Thief): Someone capable of walking in and out of Momoko's base without setting off all the alarms, and therefore the person on whom the heist hinges. She also is capable of long range spying, a skill that will not only make planning the heist easier, but enable her to (hopefully) have a better grasp on what's going on around her when she's actually
in the base.
Maiko (The Brains): She has detailed knowledge of every magical girl in the area, and thus knows how their weaknesses and how to plan around them. Plus the person with the most incentive to get the heist done.
Yumi (The Backup): With her generalized wish magic, someone who can support, replace, or double up anyone else on the team should it become necessary. Not a critical role, but probably the largest safety net they have.
Himari (The Cracker): Another former member of Momoko's team, and the one responsible for making most of the security her base has. Her job is to outfit everyone else with the necessary equipment to get the job done (and hopefully survive), as well as work out how to deactivate/bypass the security system.
Yui (The Brawn): The smallest member of the team, and the one designated for smashing things that need smashing, and causing excessively noisy distractions. Both of which she is more than happy to do, as long as nobody actually gets hurt.
Shinobu (The Face): The counterpart to Himari (except for humans and not enchantments), and Maiko for knowledge gathering. More versed in social fu than any other member of their team (except possibly Yui to everyone's surprise), she schmoozes around to try and get her magical hooks into other people to nudge them away from where the heist team doesn't want them to be.
At least 1 person here is going to double-cross the group to Momoko, and another one is going to betray them for their own ends. Have fun guessing who.