They really did have another artificial heart prepared, which makes sense because breaking her old one wouldn’t make sense otherwise. Everyone in LycoReco except Chisato has their eyes on it. Wouldn’t they still need a surgeon to install it though. From the flashbacks it seems that Yoshi was the one who did the surgery the last time so it seems like in the end its up to him.

The tower was one big trap designed to show the public the means the Lycoris will take. Mashima’s plan was actually quite smart in how he used information against the Lycoris instead of trying to fight them head on. The other part of his plan involving arming civilians seems to be going as intended as well with people actually using them. The Lycoris didn’t follow the previous order not to shoot and things could get ugly.

Chisato once again shows the lengths she will go not to kill, saving people from falling to their deaths at great personal risk. Given that its unlikely she would accept any offer from Yoshi to kill for the heart. Takina made such a entrance which doesn’t really make sense but it was really cool.