Well, according to one of the lines Shu used, it has been a couple of days since Hare's death, and we can easily say that there have been some very noticable changes.
Firstly, it seems that within those few days, Shu has created an organisation out of the students left in the school. The lower ranked students have to fend for themselves when it comes to getting their own vaccine according to Shu, and if they can't, Shu believes that they shouldn't waste their resources on students that can't even fend for themselves because it wouldn't be worth it. Originally, the normal Shu would never have thought this, but because he's completely changed, his thoughts and opinions have also changed to those that he feels are acceptable in the current world their all in. The strongest live, the weakest get left behind.
Secondly. Yahiro seems to be Shu's right hand man. Coincidence? Wasn't everybody talking about how Yahiro planned everything in the last thread. I believe this is going to go somewhere. The right hand man will eventually betray and take over, it happens on a lot of occasions. He then hears about the lies being spread around about the void causing Hare's death and he felt threatened. This could also mean that maybe he's manipulating and using Shu for his own purposes.
Thirdly, the people from episode 14 that once hated Shu and were looking to turn in the Funeral Parlor are now loyal servents to him who are stealing the vaccine from other people still in the city. The rest of the students who doubted him in earlier episodes now treat him with respect and don't get in his way because they know he is a leader to fear. People even idolise him now. Shu is turning into Gai. Ayase idolised Gai, and now similar things are happening with Shu.
Shu threatened Ayase, Arugo and Souta and only fully trusts Inori. Things are starting to piece together.
Also, whoever that girl is with that aweomse scyth void is freaking awesome! Let her have her own action scene or something, and don't let her die, plleeaassee!
Why did they have to make Shu look so weak against Arugo. He finally becomes a badass and yet he still can't fight back
Well, at least now we know that if people's voids are broken, they themselves die as well.
But, it appears all this change, both emotilnally and physically, plus the pressure being put on Shu, he's starting to go crazy. And Inori killed/injured Arisa! This is going to lead to nothing but trouble.
And oh my god, is that Gai at the end!?