Many Japanese people hope to receive handwritten messages from others even though they have resistance to handwrite messages for them. In previous studies, we have revealed that fusion character with handwriting and typeface could reduce the resistance toward handwriting. However, the system used in the previous studies did not allow users to change the type of typeface and the fusion rate, so it was not clear how our fusion method can be utilized. In this paper, we implemented a prototype system to create message cards with a fusion method which enables users to control the fusion rate and to select the typeface. Then, we conducted experiments on whether writers change the way to use the system according to their relationship with the reader or the effect of the message card’s design. The results of the experiments revealed that the writer changed the way to use the system depending on card designs and their relationship with the reader.