"My, such hostility," Mitsuki replied with a raised eyebrow, targeting Ryuko with that comment even as she finished off the cookie that she currently held. "We may have our ideological disagreements, but I don't see why that has to stop us from being friends if we want to." She certainly seemed to believe that particular fact. They were all magical girls, so even if they had their differing philosophies, they could still get along. 

Moving on to a cookie of the Contractor himself, she flashed a specially bright smile to her fearless and dour leader Erika, even as she was accused and questioned. "Well, I would never be so vain as to request you make cookies of me, but if that happens I won't complain. Besides, is there something wrong with being in a good mood?"

That said, she turned to listen to the introduction itself, sampling her food and waiting for the good bits to arrive. For example, the knowledge that they would have a special guest, and the quick arrival of said special guest. A chill ran through the room as Yuna entered, a reminder of the power that she had which could be brought to bear with such visible force. It was interesting to have her back here, and surely that could only promise interesting things. 

Mitsuki's smile tightened slightly, treading dangerously close to a smirk at the same time. Oh, she was always a fan of interesting times. They always provided such....juicy opportunities.

The arrival of the Contractor seemed to solidify that, even as he noted the surge in Primordial activity here in town, and explaining that he had brought them here to arrange a temporary cooperation between the two factions. She was more than willing to work along with the Hero Brigade, if only because of the opportunities it presented. But she imagined that some of her coworkers might not be so happy with that choice.

"Do we know why this is happening," she asked, leaving off deciding for fact finding. She could make her choice later.