TV-Series
Description
The character known as Butt Detective is the protagonist of his namesake series. He is a private investigator whose most distinguishing feature is his head, which visually resembles human buttocks, complete with pronounced cheeks and a central cleft. His eyes are positioned on these cheeks, while a neatly groomed, side-parted hairstyle is revealed beneath a signature beret. This beret is a family heirloom, inherited from his father, Oshiri Dandy, symbolizing a legacy of detective work.

Personality-wise, Butt Detective is the embodiment of a calm, composed, and impeccably polite gentleman. His demeanor is refined and his methodology is meticulous, highly logical, and intellectually rigorous, drawing a clear inspiration from classic detectives like Sherlock Holmes. This serious and earnest approach to his work is a constant, even as the world around him treats his unusual appearance as completely normal. He is a creature of habit with sophisticated tastes, enjoying hot beverages, sweet treats like potato cakes, and relaxing in long baths after a case is solved. He has a particular fondness for sweet potatoes, a preference that whimsically aligns with his digestive-themed abilities. He is also known to be averse to spicy food.

Butt Detective's primary motivation is the pursuit of truth and justice. He is driven by a deep-seated commitment to solving mysteries and seeing that criminals are held accountable for their actions. This unwavering dedication is so strong that he is willing to face personal injury or navigate morally complex situations where loyalties are tested, always reaffirming his commitment to see a job through to the very end. His signature catchphrases bookend his investigations; he typically begins by stating, Hmm, I smell a case, and upon cornering a suspect, he politely declares, Pardon me while I poot you in your place, before deploying his unique method of incapacitation.

In his role as the lead detective, he is frequently called upon by the local汪汪警察局 (Wanwan Police Station), particularly its chief, Chief Maltese, a small white dog who often seeks his expertise. His key relationship is with his steadfast canine partner, Brown, a small, earnest, and sometimes overzealous brown dog who serves as his assistant. Brown is frequently caught in the collateral effects of Butt Detective's crime-solving technique. Other key relationships include a long-standing rivalry with the flamboyant international jewel thief known as Phantom Thief U. This relationship is complex, as later narrative developments have seen the two form pragmatic alliances against greater threats, such as the Phantom Thief Academy and its leader, Phantom Thief G.

Throughout the series, Butt Detective demonstrates notable development by facing increasingly complex conspiracies, such as the Dark Age Plan, and forming unexpected partnerships that challenge his usual solo methodology. One significant storyline explores his past, revealing a former partner named Suisen, and forces him to grapple with a painful moral conflict between personal loyalty and professional duty. He has also taken on unconventional roles, such as going undercover as an idol to solve a case.

His most notable ability is his deductive genius, humorously underscored by his stated IQ of 1,104, a number that is a phonetic play on the Japanese phrase for good butt. This sharp intellect allows him to solve crimes through careful observation and logical reasoning. However, his most famous and effective tool is his potent facial flatulence, sometimes referred to as fartillery. This targeted emission is his primary method for subduing fleeing or resisting criminals, and its use is always preceded by a polite apology.