A game device includes a processor implementing a character process that performs a character control process; a game process that performs a game parameter calculation process; and a display process that displays a game image based on results of the game process. The processor implements the character process that performs a process that controls a master character that is operated by a player, and a process that controls a plurality of subordinate characters that are subordinate to the master character. The processor implements the game process that performs a process regarding a game event that involves a first subordinate character and a second subordinate character based on a first relationship parameter between the first subordinate character and the second subordinate character, a second relationship parameter between the master character and the first subordinate character, and a third relationship parameter between the master character and the second subordinate character.