While she might not express overly hostile enmity for the Hero Brigade, Mitsuki was nonetheless skeptical of the explanation provided. A Primordial Queen arriving here simply because of their conflict? No, that was unlikely. They had not affected significant amounts of the populace after all, and their numbers were not enough to be that much of a draw for something so powerful. No, she had the feeling there was something else going on. 

She let none of that slip though, mentally deciding to investigate on her own later. "If you say so," she replied calmly, letting the matter drop. Instead she turned to Ryuko once more, the girl rejecting the notion that they could possibly be friends in spite of all that had just been said. She was a stubborn one, wasn't she? "I'm sorry you think that," she replied in turn. "But I feel that you may find yourself surprised, if you allow for the opportunity." She winked, then let it drop. The proof could come later. 

There would not be much more time to discuss things as the announcement of a primordial attack was made, the groups splitting up in order to go fight them off wherever they showed up. That was concurrent with Angel arriving, whom Mitsuki waved at. The group split up, some girls headed off to the bridge, while the others headed off towards the station. Certainly they had enough girls here to handle two attacks at once, though whether it could be done without animosity and conflict amongst those girls there was in doubt. 

"Well, I suppose I shall head downtown," she said with a smile, rising to her feet and twirling as she transformed into her magical girl attire. With that done she waved to the others, even as she moved for the door. "Until we meet again." With that she headed off. There was work to be done, and it would not wait for her.