1. A non-transitory storage medium having stored thereon a program executable by a computer of an apparatus for creating a character object by combining a plurality of part objects, each of which is for each of a plurality of parts which are used for forming a character object appearing in a virtual space, the program causing the computer to execute: generating a reference character object by combining part objects, each of which is selected for each part on the character object among the plurality of part objects stored for the respective parts; generating at least one candidate character object by changing at least one part object among the part objects used in the reference character object; displaying the reference character object and the candidate character object; accepting an input to select one of the reference character object and the candidate character object; determining a part on the character object for which different part objects are used between the selected character object and the reference character object by comparing the selected character object and the reference character object; generating at least one new character object by changing the part object used for the determined part on the character object with priority among the part objects used in the selected character object; updating the reference character object with the selected character object; and updating the candidate character object with the character object generated in the changed character generation step.