This paper examines how characterisation influences the development of characters’ personalities in Emmanuel Mbog’s Watoto wa Mamant’ilie and Mussa Shakinyashi’s Daladala Kutoka Mbagala. The research adopts a qualitative approach and integrates Freud’s Psychoanalytic Theory (1890) and Propp’s Theory of Narrative (1895) as a combined analytical framework to examine the characters’ expressions, the authors’ narrations, and performances within the chosen texts. The study embraces the constructivist paradigm, a philosophical and theoretical framework employed across diverse fields such as education, psychology, sociology, and epistemology. This paradigm fundamentally posits that individuals actively shape their comprehension and understanding of the world through their personal experiences, beliefs, interpretations, and interactions with their surroundings. The researcher employed this paradigm to designate the selected texts as the main data source. A thorough examination of the chosen texts was conducted through close reading. Literature reviews focusing on main character portrayal and the shaping of their personalities in the selected texts were conducted. The researcher validated Propp’s (1895) perspective, asserting that main characters in a narrative reflect the author’s persona. This paper revealed that characterization plays a central role in developing the personalities of the main characters. The paper, therefore holds significance as it expands our understanding of characterization and its impact on the central personalities in literary works.