Plot:
So as I mentioned, anime has a lot of plot convenient situations and even if you can stand some of them at the beginning (most of them are just like in typical anime), you will soon or later get tired of this (unless you liked Sword Art Online or Owari No Seraph). Basically a lot of people close to main character turn out to be somehow connected to main events making you realize that random main character wasn't really that random. Also when it comes to revealing the truth at the end of first half of the series and in the last episode, you may actually wonder if author of the manga made it up in the last second or he just used the easiest possible solution expecting readers and viewers not to care about it at all. The whole rebel thing, infection, and "power of the kings" were good and at first glance it looks like really enjoyable show (I really enjoyed watching it) that is destroyed by previously mentioned mistakes.
First half of the series look like half-fillers showing operations of "undertakers" that don't even develop the plot and don't have significant aftermath later on. Thankfully first half of the series gives some boost of action and wake you up after those fillers. But then again it slows down just to make rushed up ending.
What made me stay positive about plot were some really emotional dramatic moments that I consider worth watching and second last fight.
Characters:
I liked Shu from the first episode, he is from those characters that usually doubt in their strength and don't have good social skills. His character development was really good, he has couple of major changes in his personalities, also he shows really well the problem with responsibility for having super power (shown as good as in code geass) + he had one nice badass moment.
Inori on the other hand can compete to become the worst character ever. first scene shows here escaping from guarded facility with precious item avoiding explosions and gunfires. That makes viewer expectations for later events. Unfortunately she turns out to be fan service without personality. She just stays close to main character and puts trust in him more than he does. She is always willing to act as his weapon. They don't explain why, and we actually don't know anything about her at all.
Gai is that cool looking mysterious leader of the group. I liked him just because he was person Shu compares himself to and it was enjoyable to show how they argue. Usually though he is just invincible guy who somehow knows everything and that is pretty annoying.
Ayase is a particular character among other side characters. She's on the wheelchair (how many anime with such characters have you seen?). One of the better characters, there are two really great scenes with her in the second half of the show. Also in my pervert mode I would add that she looks hotter than Inori.
So in the end this anime has a lot of things that will make you hate it, but on the other hand it can be enjoyable and worth giving a try if you like drama and super power genre combination.
