[Since it's Adachi's castle, he is well aware of there being people that shouldn't be here. The mirrors aren't only a decoration. Even if the image isn't all clear and even if he doesn't see much, he can recognize Dojima anywhere.

It's only a matter of time before they find the place he's at. He definitely needed to escape before that.

Adachi faces a mirror and says, in a commanding tone.]

Mirror Mirror on the wall.
Who is the fairest of them all.
O Magic Mirror, stall them now.
Let the route here change somehow.


[He's not sure if it will work, but at least he gave it a try at least, before heading out the backway. Good thing he had multiple escape routes in his castle.

And yes, his quirk made him say the first one.]