Stephen didn't move. He didn't have to move, since he had several non-lethal methods at his disposal of removing a threat. He watched her though, in the same way that one would calmly asses a situation if they were doing so at a distance. Which it could be argued that he was at any given moment, considering the vast number of things he was trying to keep a cosmic eye on.
The cloak though, that moved all on it's own, and not at all coordinated with the wind. If the breeze was so soft it couldn't even flip the pages of a discarded newspaper, the cloak was methodically swaying back and forth, like the pendulum of a grandfather clock in slow motion. If the winds shifted or kicked up a little bit, it didn't halt the movements in the slightest. It continued on regardless, defying the natural world around it.
"Because the universe has marked you as someone of importance to it," was Stephen's unhurried reply, and it was done in so manner-of-fact manner that it almost seemed clinical. It wasn't impolite or rude. It simply was. "I have a vast well of magic at my disposal. Enough that I inadvertently split a timeline in two. So let's go down the checklist of frequently asked questions. Yes, you're still you. Yes, you've been here the whole time. Yes, you're the same as your prime counterpart. No, you didn't realize it until the universe tapped you on the shoulder just now. No, I am not a wizard like Gandalf. No, I can't take you to see your other self. Yes, I'm done with this universe's bullshittery. And yes, that's why there was sharks in tornadoes."
He sighed and one corner of the cape's collar gave him a 'there, there' pit pat gesture on the cheek.
Stephen realized he forgot something, "Oh. Yes, I'm sorry it happened. Accident. Please don't stab me. I can answer questions and I have something to give you."
There. Now the bases were covered, and he went back to watchful waiting to see if she was going to attack or not.