Brown is a character from the anime film Eiga Oshiri Tantei: Curry Naru Jiken, where he serves as the steadfast assistant and constant companion to the title character, Oshiri Tantei, the detective known for his distinctive appearance. Within the narrative of this film and the broader franchise, Brown is established as a small, anthropomorphic dog with brown fur, from which his name is derived. His primary background is defined entirely by his role as a loyal partner to the detective, accompanying him on investigations and providing essential support. While specific details about his life before becoming an assistant are not detailed, his identity is firmly rooted in this function across all his appearances in the movies and television specials.

In terms of personality, Brown is characterized by his reliability, eagerness to help, and unwavering loyalty. He often provides a grounded, everyman perspective that contrasts with the more eccentric and supremely confident demeanor of the detective. His role frequently places him in situations where he offers moral support, reacts to the bizarre circumstances of their cases, and sometimes serves as the recipient of comic relief. He is not the primary deductive force behind their investigations, but he is proactive in gathering clues, interacting with witnesses, and assisting in the physical aspects of solving mysteries. In Eiga Oshiri Tantei: Curry Naru Jiken specifically, Brown joins the detective in investigating a peculiar case involving a special curry that causes people to lose their sense of taste. His motivation throughout the story is straightforward and consistent: to help his partner uncover the truth behind the cursed curry, confront the shadowy figure orchestrating the plot, and restore order for the affected citizens.

Brown's role in the story is that of the indispensable sidekick. He is the detective's primary point of contact and collaborator, often participating in the legwork of the investigation, such as searching for clues and questioning suspects like rival chefs or the mysterious spice merchant involved in the curry incident. His key relationships are centered on his partnership with Oshiri Tantei, defined by mutual trust and a shared goal of solving crimes. He also interacts with other characters within the film's world, including supporting figures like the baker Cream and the cat Mocha in other installments, as well as authority figures such as Police Chief Maltese. His dynamic with the detective is often tested by the latter's unconventional crime-fighting methods, most notably his use of potent flatulence to incapacitate criminals. Brown is frequently depicted as being accidentally caught in the aftermath of this ability, an experience that reinforces his role as the long-suffering but endlessly devoted partner.

Regarding development, Brown does not typically undergo a significant personal transformation or character arc within a single film. His character is defined by his consistency and reliability. He serves as a stable, familiar presence for the audience. His growth is more evident in the strength and resilience of his partnership with the detective, facing each new, often absurd mystery with the same determined spirit. His notable abilities are less about extraordinary powers and more about practical skills. He is a capable communicator, able to talk and reason effectively. He is observant and persistent, helping to decipher puzzles and track down leads. His courage is also an ability of note, as he willingly follows the detective into strange and potentially dangerous situations, from confronting secret organizations to enduring the olfactory side effects of his partner's unique method of subduing villains. Ultimately, Brown is the essential anchor to the detective, providing the human or canine element of perseverance and heart that complements the detective's brilliance.