A method for configuring a character in a game includes generating a first non-player character of a first generation in the game, the first generation being associated with a first difficulty level, and detecting a target event affecting the first non-player character of the first generation in the game. The method further includes, based on the first non-player character of the first generation affected by the target event, obtaining an evolution indicator of an evolution from the first generation to a second generation associated with a second difficulty level higher than the first difficulty level. The method further includes, in response to the evolution indicator indicating that the evolution from the first generation to the second generation is successful, generating the second generation comprising two or more second non-player characters while one or more non-player characters of the first generation remain in the game.