Hmmm, maybe it's premature to think of the long term, but since Muhou and possibly the rest of these things seem to be in the magical girl weight class, maybe we should think about a recruitment pitch? Like, what sort of life are they going to want for themselves, and is that something they can get by affiliating with our group?
For Muhou, I assume that she'd enjoy having friendly fistfights on a regular basis, and that's something she pretty much needs meguca for. She could hunt witches, and she'd be welcome to do that as well, and she's clearly in the right general weight class. She might also just want friends, and as a magical person-thingy that might also mean meguca are her best option.
Kyoufu would be somewhat harder, but we'll ideally learn more about her soon. I'm guessing she'll have similar constraints of having trouble getting a non-meguca social circle due to her nature, so we might have a decent recruitment pitch there as well. If someone is going to try to talk to her on the basis of fear, and turning that into a productive conversation... Yui would be ideal because of her general resilience but I don't think she could do fear in the same way. And I'm not sure if someone could score a social win with her the same way things turned out with Muhou.
If Kyoufu woke up in an isolated place with a phone, that might be a much easier way to talk to her. That's what I'm suggesting at the moment. I assume someone will have a better idea.
I'll second trying to follow up on the watching magic, since it seems like it wasn't Minami. Alert Maiko and take a minute to try to overpower whatever it's using for concealment? After all, it might be related to whoever's creating this irresponsible creations, so we should definitely be able to overpower anything we need to, and something tried to make us forget it, but we're stronger? I'm out of practice reasoning with Yui's magic, but something along those lines.
Healing should be done by whoever's reasonably available with most efficient healing magic. I don't see why older meguca wouldn't be much faster than Yui just by dint of practice? So either Maiko or one of the new vets back at base. Presumably for Yui to heal well she'll have to try healing someone who really needs it instead of... trying not to look like she's been in a fight.