Character image is one of the important key points for readers to be able to read and understand the text, and at the same time contributes to helping readers understand the text's intention and the message that the author is sending. Therefore, when building a character image, the writer always wants to send many useful things to readers. Because of understanding the importance of character images, the writer wrote an article analyzing character images in the novel of Avemaria Violin by Kagawa Yoshiko. Literary theory is one of the important fields in literature that acts as the backbone to decode literary works. It is essential for high school students in the 2018 GDP to master literary theory knowledge. They learn to be able to penetrate deeply into the works and decode the meaning of those works according to the author's intention. Therefore, the writer has applied his knowledge of literary theory to the work, specifically the character image, so that readers can better understand the content and meaning of the work.