[The flattery rolls off of Joshua like water from a duck's back.]

[But.]

[He gives Yato's instruction serious consideration. With how nimble the menace proved to be already, knocking him into a mirror of all things isn't going to be an easy task. It's one that Joshua's willing to accept, especially if it means ridding Reverein of his mean spirited antics, but he's under no delusion that it won't be out of his way.]

[He gently places his books at the foot of real Yato's mirror.]

Pray watch those for me. I cannot afford any more damage to them.

[How this guy would even begin to protect the bag-o-books while trapped is anyone's guess, but Joshua's been given a mission. He'll complete it to the best of his ability.]

[Joshua takes a healthy number of steps away from the mirror and fixes his gaze back up at the roof. He calls out to the figure holding his library book hostage.]

I will give you one more chance to resolve matters peacefully. Neither of us stand to gain from further conflict.