Namra: Lazy mary sue character. She has a power due to being a hambie but we see this at the latter half of the drama when she beats gwinam at the roof. You see she has a superhuman power yet she never acts up to save others first, only at last moments. She can hear voices from far, but she doesn't hear all voices like she heard announcement she didn't hear gwinam in construction site which is so inconsistent. Once they were walking down the street and namra stopped everyone and started listening. She was hearing zombie voices. People were like what are you hearing girl. But she is slow af. She said run away. They were like why. She said zombies are coming. One girl asked how many of them are coming. She started counting 1 2 3 4 5... Counted till 11. I swear to god if they kept walking instead of stopping nothing would change. Also the actress playing her, she doesn't suit a supposedly cold and unliked character. Her facial expressions are way too cute. Especially with pouting 24/7.

Suhyeok: Boring character who never lost a fight. A male mary sue. He was supposedly hanging out with bullies but he was portrayed as an angel which is so unrealistic. Cheongsan on steroids.

Onjo&Cheongsan: Them, their friends and their parents were useful for storyline and storytelling but them not having much depth didn't bother me. Not a favorite but they were nice to watch.

Eunji: She was the most entertaining character to watch. Also the one with the most deep character. It was nice to see how for her the school was a hell while for her bully it was heaven. I want to see her take revenge like in kill bill. I want to see more of her at the second season. I want her and gwinam to face each other. The actress playing her is talented cause she literally looks insane and i was scared while watching her eat chulsoo.

Gwinam: A bully who is not a confident person. Actually that could be said for all bullies. It was fun to watch him. He is a good antagonist.

Friends: They were nice to watch. Also i liked that they didn't portray fat guys as  filler characters for diversity like western shows, but actually gave each of the characters including them a personality.

Commander: What a dumb ass. He did the right thing and the only thing doable at that moment and committed suicid3 like an idiot.

Detective and police: They only had one job didn't need to drag it that long.

Onjo's dad: He died too early for someone as clever as he is. But it was nice to see how he helped his daughter even after his death with those ribbons on trees.