who are the characters?
Duny and Ogion
A Wizard of Earthsea
The novel follows a young boy called Duny, nicknamed "Sparrowhawk", born on the island of Gont. Discovering that the boy has great innate power, his aunt teaches him the little magic she knows. When his village is attacked by Kargish raiders, Duny summons a fog to conceal the village and its inhabitants, enabling the residents to drive off the Kargs. Hearing of this, the powerful mage Ogion takes him as an apprentice, giving him his "true name"—Ged. 
what is a wizard of earthsea? A fantasy novel who is the author? Ursula K. Le Guin
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A Wizard of Earthsea [SEP] Plot summary
The novel follows a young boy called Duny, nicknamed "Sparrowhawk", born on the island of Gont. Discovering that the boy has great innate power, his aunt teaches him the little magic she knows. When his village is attacked by Kargish raiders, Duny summons a fog to conceal the village and its inhabitants, enabling the residents to drive off the Kargs. Hearing of this, the powerful mage Ogion takes him as an apprentice, giving him his "true name"—Ged. Ogion tries to teach Ged about the "equilibrium", the concept that magic can upset the natural order of the world if used improperly.