[When he hears the command, Ishimaru turns around with the intention to object! ...But he finds himself facing the boy charging directly at the door, so there's little else for him to do but move out of the way! He watches in wonder as the stranger's tackle fails incredibly! With such a fall like that, Ishimaru feels inclined to go along with his idea.]

Are you okay? You should not do something so reckless! [Ishimaru says even though he wasn't far from trying the same thing himself.]

A... a window, huh? [He doesn't want to give up on the door entirely. But this person raises an interesting possibility.]

You might be onto something! What are you standing around for? Let us seek one out posthaste!