A character display apparatus, a character display method, and a non-transitory computer readable medium storing a character display program are capable of automatically avoiding a handwriting character being illegible during input of the character by detecting an overlap between lines to be drawn during drawing based on trajectory data of a handwriting character to determine a presence/absence of an illegible part. If it is determined that an illegible part is present, the thickness of the handwriting character is automatically selected again to be thinner and the image of the handwriting character is drawn again, which avoids illegible part occurring in the handwriting character without inputting the character all over again.