Mitsuru's hand flashes up in a 'stop, please' sign. Something about his choice of words is... well, bewildering for one. But more importantly, there's an echo of what she's experienced in what he says. Albeit a very faint echo of her own experiences, given how fast those words are coming in.

"Wait a moment... how does one-?" Go about forgetting and remembering how to swing a sword? But then, it probably has something to do with how one can forget and then remember how to summon a different self, so Mitsuru stops that question short.

"...Never mind, actually. But what I did understand from that is that you've... gained a sudden understanding of swordplay, and wish to express it?"