This section is dedicated to the cast of characters that takes part on the series. Some descriptions may include mentions of mayor plot lines, so there will be SPOILERS. Another thing you have to keep in mind is that, there is a set of characters that are students (which take the main focus) and another that are teachers; I am not going to mention all the characters that make up this last segment, given that there are teachers who have no influence on the plot or relevant appearances.

Anya Nosova is Germanovich's granddaughter. In the first episodes, we find out that Nosova was homeschooled because her grandparents wanted to prevent the same thing from happening to her as to her mother: to get pregnant at 15 years old, in addition, Germanovich considers 9A as an undisciplined and chaotic class that can eventually misinfluence her. Even tho, she had manifested curiosity about the average school experience before, she finally takes the decision to go back into school once she accidentally meets Ilya Epifanov and hopelessly fall in love with him. It's important to mention that she decides to change her look and starts dressing emo, this and her lack of social skills, makes her a bullying target for her classmates. In fact, things get worse for Anya when the nude photos she took of her while being homeschooled get leaked to the whole school and even teachers see them. She develops a rivalry with the most popular girl in the class: Olya Budilova, besides Anya has, practically, cero friends at school (for a short period she hangs out with Vera Akhmametyeva) and her two emo friends (Tatyana y Melania) turn out to be pretty awful. Due to all the bad stuff that happens in Anya's life, she is really prone to make impulsive and erratic decisions.

Ilya Epifanov is the new student whose rebellious and irreverent personality creates conflicts in 9A. Ilya lives in a very poor flat with her mom, who is seriously ill with cancer. This situation forces him to feel like the breadwinner of the house, so he takes multiple jobs and takes care of his mother no matter what. In school, he's not very well received due to his personality and also, he refuses to explain why he was expelled from his former school, which creates an aura of mystery around him. Something I think is worth mentioning is that, you will find a lot of people comparing Ilya's personality with Sergei Vodrov's legendary character Danila Bagrov (I highly recommend to watch 'Брат' (1997)) and after watching the show, I have to agree with this comparison. About Ilya's realtionships, he falls in love at first sight with Olya Budilova and he's aware of Anya's feelings, but he doesn't take advantage of that, in fact he makes it clear since the beginning that he has no romantic feelings towards Anya. He befriends Misha Dyatlov, because his dad is a medical surgeon that could, potentially, help his mom. He ends up being pretty popular in 9A, since he starts to get along with Olya, Dasha, Isaev and Korolev.

Like I stated before, Olya Budilova is the most popular girl in 9A and even some of their classmates refer to her as "the beauty of the class". Behind her eye-catching outfits and loud (really loud) laugh, hides a complicated family enviroment: her dad abandoned her when her mother was pregnant (it is implied that her mother was very young at that time) and apparently (I'm not very sure about this point) there's a problem with the flat they're living in (it's like they cannot longer live in there). At school she belongs with the popular boys, even tho sometimes they make fun of her. Olya's bestfriend is Darya Kharitonova (Dasha) and troughout the series she has a strong rivalry with Irina Shishkova and Anya Nosova. The feud with Shishkova is about a boy: Lyokha Shutov, he is a year older than Irina and Olya (and let me tell you that he's a motherfucker, seriously). So, Shutov wants to hook up with Olya and at the beginning things work out, but suddenly Shutov is attracted to Irina (who reciprocates) and loses interest in Budilova (righ after they have sex). From there things get really complicated and scalate really quickly, because in Olya's birthday she receives a gift (opened up by Dasha) that contained firecrackers so, she thinks that Irina sent her the gift and she gets in a physical fight with her and in another ocassion she throws Irina down the stairs and causes her to break a leg, etc. With time, Olya realizes that she reciprocate Ilya's feelings and a lot of bad stuff happens to her.

Vadim comes from a very poor and violent background, where his father is always drunk and his little brother, Fedya, is often left behind. At the beginning he used to be friends with Timur Zadoev, and inmigrant clasmmate whose mother works at the school canteen, but they fall apart when the history teacher started to indoctrinate him with racist doctrines, which derived in Isaev joining the local skinheads. It is really impressive how from this point until the end of the series, Isaev seems to become more and more brutish, speaking with a more limited vocabulary that consists of nationalist slogans; it is so evident that even the other characters notice that and mock him. Later on, he starts dating Bagheera, a skinhead girl. About his friends, he's part of the popular kids in the class, he gets along with Korolev and I may be mistaken, but then he was kind of hanging around with Vovets Falikov.

The most popular boy of the class and also the one with the wealthiest dad of 9A. Korolev is rude and doesn't hesitate to mock someone if he finds the opportunity. He does terribly in grades, so that's why his father, Anton, decides he should attend extra classes with the physics teacher, Natalya Nikolaevna. Korolev is really attracted to her and after one afternoon when Anton goes to pick him up, both Natalya and Anton realize they like eachother, so they start having an affair. Eventually, Sergei finds out and uses the affair to blackmail his father into giving him money in exchange of not telling his mom and also, blackmails Natalya Nikolaevna, spreading rumors about her. Korolev wasn't a character that had much of a development, as far as I know.