This paper discusses a sentence in the novel Marina ili o biografiji by Irena Vrkljan. Sentence types are dived by composition and characters to explain the influence of sentence types on the characterization of an individual character. Sentences are divided into complex, compound-complex, simple, sentence strings and unvoiced sentences. Complex sentences are divided into dependent and independent complex and then additionally sorted by types of those sentences. The sentences are divided according to three main characters: Marina Cvetajeva, Irena Vrkljan and Dora Novak, and each character was analyzed individually with regard to the representation of certain types of sentences. At the beginning of the paper, a theoretical framework was set up in which syntax and stylistics are discussed based on contemporary Croatian grammars. Then, the research methodology and quantitative approach to the syntax of the text are described, and after that the results of the research itself are listed. The results are presented graphically and tabularly, followed by analysis. Finally, the synthesis and comparison of the three main characters based on the composition of sentences is presented and the conclusion of the research is derived.