bt (ma shounen bt)

B.T. is the protagonist of the Ma Shounen Bt series, as well as its one-shot pilot, B.T. "The Wicked Boy". Although B.T. are his initials, his real name is unknown since Mugikari Kouichi keeps it a secret.

He is a clever yet quite malicious boy who befriends Koichi. With his smarts, B.T. fights against all manners of bullies but also commits his own crimes.

B.T. makes a return as the protagonist of the spin-offs Cool Shock Old B.T., Cool Shock Guy B.T., and Cool Shock High School Student B.T., which follow events in B.T. and Koichi's lives after the original series. An alternate version of him is the protagonist of the 2024 reboot manga.

B.T. is a young boy with an average constitution. He has mid-length hair cut into a regular haircut with a velvety texture. His hair is mostly of light color but his hair becomes dark when it goes down on his cheeks and also on his eyebrows. He has big eyes with large eyebrows and a sharp gaze.

In the Cool Shock Old B.T. one-shots set decades after the original series, B.T. is now an old, tall and lean man. He's kept the same haircut from his childhood and has a thin chin puff. B.T. now wears a dark three-piece suit with a tie with a "BT" print and a bright shirt underneath. His jacket is a plain jacket with a black and white arrow motif on the shoulders and sleeves whose ends are decorated with "X"s and a serrated line. He is briefly seen wearing another dark suit with a bowtie.

B.T. now wears a special wristwatch that can do things like signalling him when it's time to take his drugs and to control his car. In Cool Shock Old B.T. Chapter 2: The "Say Hi to Old Virginia" Incident, it is shown that he is now bound to a wheelchair.