Central Characters:
* Ryōhei "Mikado" Ryūgamine: A naive and optimistic boy from the countryside who moves to Ikebukuro to be with his childhood friend. He becomes entangled in the city's underworld and develops into a leader figure.
* Masaomi "Masa" Kida: Mikado's childhood friend who is involved with the Dollars, a large and mysterious group operating in Ikebukuro.
* Celty Sturluson: A Dullahan (headless rider) who works as a courier in Ikebukuro. She is searching for her head and becomes involved in various conflicts.
* Shizuo Heiwajima: A massive and intimidating bartender with a short fuse. He is known for his incredible strength and has a long-standing rivalry with Shinra.
* Shinra Kishitani: A charismatic and manipulative information broker who enjoys playing mind games. He is an old friend of Shizuo and often provokes him.
Other Important Characters:
* Izaya Orihara: A cunning and sadistic information broker who revels in chaos and enjoys manipulating others.
* Anri Sonohara: A timid and quiet girl who is a member of the Dollars. She is a powerful user of "ability."
* Simon "Kyohei" Brezhnev: A former Russian soldier who is involved in the Dollars.
* Erika Karisawa: A delusional girl who believes she is a vampire. She is a member of the Dollars.
* Yōsuke "Walküre" Haneda: A skilled fighter who is known as the strongest member of the Dollars.
* Kasane Kuji: A mysterious girl who has a connection to Celty.
* Koyomi "Kyou" Kusuhara: A journalist who often gets caught up in the chaos of Ikebukuro.
This is just a brief overview of some of the main characters in Durarara!!. The show has a complex and interconnected cast, with each character playing a significant role in the story's unfolding events.