Obi is a 26-year-old Nigerian man who recently returned from studying English in Britain on a scholarship funded by the Umuofia Progressive Union. He secures a senior position in the civil service in Lagos, holding idealistic views about eradicating systemic corruption through the appointment of young, educated Nigerians. Caught between traditional Igbo expectations and his modern, Western-influenced individual desires, he faces mounting financial and social pressures.

Clara is a young Nigerian woman who studied nursing in England and works as an assistant nurse in Lagos. Financially independent and educated, she carries the heavy social burden of being an *osu* (an outcast in traditional Igbo culture), which complicates her romance with Obi. She often suppresses her feelings, appearing hesitant and depressed despite her professional autonomy.

Isaac is Obi’s father, a Christian catechist living in the village of Umuofia. He strictly follows Western religious practices and firmly rejects traditional Igbo storytelling and customs, going so far as to silence his wife's folk tales. Despite his Christian faith, he maintains rigid views regarding the traditional *osu* caste system.

Mr. Green is Obi’s boss in the civil service. He represents European authority in colonial Nigeria and openly harbors racist sentiments, believing Nigerians are inherently corrupt. Though he works hard and pays school fees for his steward's sons, his view of Africa is strictly colonial, restricting his interactions to subordinate staff and dismissing Nigerian independence efforts.

Hannah is Obi's ailing mother who lives in Umuofia. Although she obeys her husband's strict Christian rules, she secretly harbors a fondness for traditional Igbo culture and used to tell her children folk stories. She shares a deeply emotional bond with her son and exerts significant influence over his decisions regarding marriage.

Joseph is Obi’s friend and former classmate who works as a clerk for the Nigerian government. He hosts Obi in Lagos and serves as a pragmatic voice regarding traditional expectations, warning Obi about the social consequences of marrying an *osu* and ignoring the Umuofia Progressive Union's advice.

Christopher is an economist and civil servant who serves as one of Obi’s close friends in Lagos. He frequently engages Obi in debates about politics, bribery, and relationships, offering a more cynical and worldly perspective compared to Obi's strict idealism.

Miss Tomlinson is Mr. Green’s English secretary. She is friendly toward Obi and Clara but casually agrees with Mr. Green's critical remarks about Nigerian privileges, reflecting the normalized colonial attitudes of the European administrative staff.

Sam is the Minister of State. He is a wealthy and influential politician who socializes with Clara and Obi, representing the elite tier of Nigerians attempting to operate within the upper echelons of the changing government.

Mark is an Igbo man who attempts to secure a scholarship for his sister by seeking political favoritism. He represents the everyday pressures of systemic corruption that Obi faces in his new government position.

Elsie is a young Nigerian student seeking a scholarship to study in England. Unable to afford her studies and aware of the favoritism of the board members, she visits Obi's apartment offering personal favors in exchange for his recommendation.

Charles is a messenger working in the civil service office. He borrows thirty shillings from Obi, and his inability to repay the loan quickly contributes to Obi's growing realization of his own financial difficulties.

MacMillan is a fellow English graduate traveling to Nigeria. He befriends Obi during the sea voyage and spends time with both Obi and Clara on the ship.

Bisi is Christopher's girlfriend in Lagos. She accompanies Christopher and Obi's social circle on outings in the city.