I Reread Chapter 62 Of Jibaku Shounen Hanako-kun And There Are Things I Didn't Understand. Did Hanako

I reread chapter 62 of jibaku shounen hanako-kun and there are things I didn't understand. Did Hanako know Yashiro was in the elevator? How did he know someone was in the elevator in the first place? Later we see him summon it, so does that mean the elevator is his? Honestly, I'm sorry if there are a lot of questions, but I just don't understand how he knew Yashiro was there and the relationship with him in the elevator (I mean, he also had the numbers written down that makes him move)

Hanako planned everything, he knew about the severance, he was the one who did everything alone. He knew how to get out of the boundary of number six, but he stayed there on purpose, in search of his yorishiro.

Still, Hanako waited for the right moment to get out of there. He could have summoned the elevator before, yes, but he didn't. This elevator was the one that guided Nene and Akane to the boundary of number six in the first place.

This is because Hanako wanted to blackmail Akane to get a favor from him (which he didn't manage to do).

In other words, Hanako planned everything and did everything on purpose.

Yes, apparently, only Hanako has the power to use this elevator. We haven't seen any other character summoning it.