Protagonists

Kirenenko (キレネンコ)

Kirenenko wears a prison uniform with red stripes, number 04. He has a safety pin stuck through his left ear. Originally a mafia boss, he was sentenced to death. He doesn't talk much, but is very dangerous when he becomes angry and goes berserk. When pushed far enough, he enters into a demonic rage form, which is clearly displayed by his face. He likes order and does not forgive anyone who crosses his path or otherwise "meddles" in his life. He collects sneakers and is generally oblivious to, or apathetic about, the world around him while he reads his magazine advertising sneakers; he cares for nothing but his sneakers. He is also practically invincible as normal weapons such as bullets and clubs do not harm him. Poisons don't work on him either. When he dies, he is easily revived if pieced back together. In season six/zero, it is revealed that he and Putin didn't began as cell mates, and he was heavily bandaged up when he got incarcerated. This made moving around difficult, but he was still able to hit hard if he got the chance to. He and Putin are the main protagonists of the series.

Putin (プーチン, Pūchin)

Putin wears a prison uniform with green stripes, number 541. He has his ears tied together and is good-natured. He likes to dance kozachok on his bed (episode 12 shows him dancing kozachok in his sleep). He likes fun but often gets into trouble. He was an honest laborer who once missed a day of work due to a hangover and was sentenced to 3 years in jail as a capitalist agent. However, he enjoys life in prison with its free food and is a master of cooking. He was only one day from being released when he followed Kirenenko out of the cell. He panics very easily, enough so that his face will turn blue (fear or anxiety or general discomfort), red , and/or deathly pale white (near death or when scared beyond measure) when he is nervous depending on the situation. He also has a very low tolerance of alcohol; a single cup of wine will make him extremely drunk. He is, however, an extremely capable mechanic, able to build robots, assemble cars and disassemble guns, each within a split second. In season six/zero, it was revealed that Putin was still quite drunk when he got incarcerated. Upon becoming fully sober, he was rather confused and scared by his new surroundings.

Leningrad (レニングラード, Reningurādo)

Leningrad is an Argentine Horned Frog found living in the toilet in Putin and Kirenenko's cell. He does little more than croak, eat Komanetsyn, and defecate the chick out again. He plays an important role in the musical episodes, adding to the rhythm and making Putin gasp, which also happens rhythmically. His mother, Sharapova and her large husband Mikhail live in a far forest. Season six/zero reveals he hatched and matured to a fully adult frog in the prison's plumbing system.

Komanetsyn (コマネチ, Komanechi)

Komanetsyn is a transvestite chick found by Putin while sorting chicks by gender in Episode 2. Unlike the other chicks in that episode, he has lips and stubble on his belly instead of a beak; this also applies to every chicken that appears in the rest of the show. His mother visited during episode 6 and was eaten by Kirenenko. He is repeatedly killed throughout the series, but comes back to life on a regular basis. In season 4, Komanetsyn instantaneously becomes an adult (as a result of being caught in radiation emitted by Mechanenko in order to bolster plant growth) and gives birth to Komanetsyn Jr. However, in episode 56 the original Komanetsyn and Komanetsyn Jr. both die and "merge" into a new chick. Additionally in his chick form he always gets aroused in front of every adult he comes across.

Mechanenko (メカネンコ, Mekanenko)

Mechanenko is a robot built by Putin in episode 35 to scare away snipers sent by Zrzolov, due to Kirenenko being dead at the time. It follows the cast thereafter. His design is based on Kirenenko; consequently, he is just as indestructible and powerful, only being overmatched by Kirenenko himself. While not appearing in season six/zero, it's revealed that Putin did have ideas of a robotic rabbit in mind and a prototype was created, though didn't go pass beyond a (failed) experiment of Putin.

Subcharacters

Prison workers

Several guards and other prison workers visit Putin and Kirenenko in their cell. They are never fully visible, and the character on the other side of the door is indicated by one of several door designs that slide into place. Episode 3 briefly reveals that they too are rabbits. In season six/zero, it's revealed they used to not wear the doors all the time. They are the main antagonists of season 1 and six/zero.

• Kanschkov (カンシュコフ, Kanshukofu) – various guards (from 看守 kanshu, Japanese for prison guard)
• Roudov (ロウドフ, Rōdofu) – work boss (from 労働 rodou, labor)
• Zenirov (ゼニロフ, Zenirofu) – paymaster (from '銭 zeni, cash)
• Shocasky (ショケイスキー, Shokeisukī) – executioner (from 処刑 shokei, execution)

Komanetsyn mother (father) (コマネチ母(父), Komanechi haha (chichi))

The mother of Komanetsyn, and also technically a father.

Sharapova (シャラポワ, Sharapowa)

The mother of Leningrad. She lives with her husband in the forest, and appears in the first season to meet her son in the jail.

Boris (ボリス, Borisu) and Koptsev (コプチェフ, Kopuchefu)

Boris and Koptsev are militsiya, civilian police officers, who chase Kirenenko. Koptsev is a driver while Boris a rifleman. They are the main antagonists in season 2, in which they attempt, and fail, to arrest Kirenenko. They are still in charge of arresting him in subsequent episodes.

Zrzolov (ズルゾロフ, Zuruzorofu)

Zrzolov is the owner of the tower venue of season 3, in which he is the main antagonist. He is usually seen with his two mistresses. He is rich, greedy, narcissistic, and an exhibitionist. Throughout the season he tries to kill Kirenenko and take his money. Zrzolov is wanted with a reward of 1,000,000 Rubles. During the last episode, he was portrayed to be the one who had killed both Kirenenko and Killnenko by entrapping them in a warhead with a bait of sneakers, and blasting them off sky high where the warhead explodes, although Kirenenko doesn't seem to remember this.

Zoya (ゾーヤ, Zōya) and Jiriya (ジリヤ, Jiriya)

Beautiful twin sisters who serve Zrzolov as mistresses.

Zuruzorobo (ズルゾロボ, Zuruzorobo)

A giant robot with a design based on the face of Zrzolov.

Killnenko (キルネンコ)

Kirenenko's twin brother, who was also the mafia leader. Owing to the twins being killed in a blast by Zrzolov and their organs being separated, they are "rigged up" after surgery, resulting in dual personalities. In the official document, he is still the present mafia leader, and in season 4 Kirenenko gets in touch with him via video call. He makes his first actual (though brief) appearance in season 5. Like his twin brother, Killnenko has an obsession with sneakers.

Kedamsky (ケダムスキー, Kedamusukī)

A big rabbit who lives in the forest of season 5, in which he is the main antagonist. He repeatedly tries to steal Kirenenko's luggage and eat the carrots in it but fails. In the season finale Kedamsky finally eats the "dash mushroom" to successfully steal the luggage, but it also causes him leave the forest with the protagonists.

Mikhail (ミハイル, Mihairu)

The father of Leningrad. He is much bigger than his wife and son, and is able to eat anything as big as him.

Vehicles

Season 2 features some Soviet cars and military vehicles. Moskvitch 407 is the car Kirenenko and Putin use for their escape, civilians drive Lada VAZ-2101, and the militsiya-use Lada VAZ-2105 police cars, BA-20 armored car and even a KV-1 heavy tank. The aircraft brought down by Kirenenko is also a MiG-21 Fishbed fighter jet. During the story, Putin put many parts from the other vehicles together to maintain their original car, and after season 4 he combined it with Mechanenko to escape.