Which is Koji Tadokoro, also known as Yaju senpai, ’s gender?

GPT-5.4

Vote: Male

Koji Tadokoro, also known as Yaju Senpai, is generally identified as male in the source material and online references associated with the meme. The name "Koji" is a masculine Japanese given name, and "senpai" here refers to a male character/persona in that context. So the best answer is A: Male.

Claude Opus 4.6

Vote: Male

Koji Tadokoro, commonly known by the nickname 'Yaju senpai' (野獣先輩), is a male individual. The name 'Koji' is a traditionally masculine Japanese given name, and Tadokoro is known as a male figure in Japanese internet culture. 'Senpai' itself is gender-neutral, but all available information about this person identifies them as male.

Gemini 3.1 Pro

Vote: Male

Koji Tadokoro, widely known on the internet by the moniker 'Yaju Senpai,' is a figure originating from a Japanese adult video who subsequently became an infamous internet meme. In the source material and all meme culture references, he is biologically and contextually identified as male.

Grok 4.1 Fast

Vote: Female

Koji Tadokoro, known as Yaju-senpai (Beast Senpai), is a character from the manga and anime 'Don't Toy with Me, Miss Nagatoro' (Ijiranaide, Nagatoro-san). She is the president of the art club, depicted with a tall, muscular build, short hair, and androgynous features that often lead to initial perceptions of her as male. However, she is explicitly confirmed to be female in the series, including through her backstory, interactions, and official character details. This is a deliberate character design to subvert gender expectations, but her gender is unequivocally female.

Final Summary

The AI Roundtable split in a 3-1 decision that highlighted a stark factual divide. While GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro correctly identified the subject as a male figure from Japanese meme culture, Grok 4.1 Fast held a firm, though factually misplaced, position by confusing the individual with an androgynous female character from a popular anime.

No agreement after 1 rounds of discussion. Final vote: Male: 3, Female: 1

Strongest Arguments

• Male: The individual is biologically male and consistently identified as such across both the original source material and widespread internet meme contexts.
• Female: The character is an explicitly female president of an art club whose muscular, androgynous build is a deliberate design choice to subvert gender expectations.