Murakami is a minor antagonist in the film Rurouni Kenshin: The Beginning, serving as an assassin for the Yaminobu, a pro-shogunate covert organization active during the final years of the Bakumatsu period. He is a physically imposing man, described as large and muscular, with black hair tied in a topknot and a shaved crown, a traditional hairstyle of the era. As a member of the Yaminobu, his primary mission is to track down and assassinate the feared hitokiri known as the Battosai, Kenshin Himura.

In terms of personality, Murakami is portrayed as a duty-bound and zealous operative, driven by his allegiance to the shogunate and his desire to eliminate a key figure of the Ishin Shishi, the revolutionary movement seeking to overthrow the existing order. His motivation is purely professional and ideological: to protect the Tokugawa government by destroying one of its most effective enemies. He shows no hesitation or moral conflict in his role as an assassin, acting as a direct agent of the Yaminobu's larger scheme to neutralize the Battosai.

Murakami's role in the story is that of an early threat and a catalyst for the deepening relationship between Kenshin and Tomoe Yukishiro. He attacks Kenshin in a narrow alley after Kenshin intervenes to protect Tomoe from a group of rowdy men. This encounter is significant because it marks the second time Tomoe observes the aftermath of Kenshin's lethal violence, and it solidifies her decision to remain in Kyoto. Kenshin dispatches Murakami with cold efficiency, demonstrating the vast gap in skill between a regular assassin and the legendary Battosai. This fight serves as a reminder of the constant danger surrounding Kenshin and reinforces the brutal reality of his profession.

His key relationship is with Kenshin, whom he targets as his enemy. There is no direct personal connection between them beyond that of hunter and prey. Murakami's attack is a direct challenge, and Kenshin's swift and merciless response highlights the ruthless nature of Kenshin's existence as a hitokiri. Murakami also has a brief interaction with Tomoe, as he approaches her to gather information about Kenshin following the initial conflict, showing he was using her as a tool to track his target.

As a character, Murakami does not undergo significant development. He is a functional antagonist whose purpose is to demonstrate the unyielding hostility of the world Kenshin inhabits. His appearance and death are contained within a single scene, and he serves as a narrative device to advance the plot and reinforce the dangerous stakes of the setting. His death provides one of the early moments that compels Tomoe to stay close to Kenshin, inadvertently setting the stage for their deeper entanglement.

Notable abilities include his physical strength and his skill as a hired killer. He is depicted as a capable fighter, able to wield a sword with enough competence to be sent on a mission to assassinate a high-value target. However, compared to Kenshin, he is outmatched. Kenshin defeats him in a single, fluid sequence, dispatching him without visible effort. Murakami's most significant trait is not his combat prowess but his role as a representative of the forces arrayed against the revolutionaries, embodying the clandestine violence that characterized the twilight of the shogunate.