The "One Piece" treasure itself-the legendary "One Piece"-has not been visually revealed in the story so far. It remains a mystery within the series created by Eiichiro Oda. The story focuses on the adventures of Monkey D. Luffy and his crew as they search for this ultimate treasure, which is said to be located at the end of the Grand Line. Regarding the visual style and character designs in "One Piece," the series is renowned for its unique and diverse character appearances. Characters range from the flamboyant and stylish, like Crocodile and Donquixote Rosinante, to the gothic and cute, like Perona, and the imposing and detailed, like Charlotte Katakuri and Marshall D. Teach (Blackbeard)

. The art style has evolved over time, with characters' proportions and details becoming more exaggerated and expressive, emphasizing their personalities and roles in the story

. In summary, the actual "One Piece" treasure's appearance is still unknown in the narrative, while the series is celebrated for its distinctive and memorable character designs that contribute significantly to its appeal