Nickname: Bubba

Street Names: KO, Hiro, Roshi

Birthday: April 1, 1992

Zodiac Sign: Aries

Age in A Storm Called Ronin: 15

Heritage: Japanese-Chinese

Hometown: Boston Chinatown

Family: The Onigahara family

Siblings: Ronin Onigahara, Jade Onigahara, Vincent Onigahara

Guardians: Hitomi, Yoshihatsu, and Kenji Onigahara

Crew: Street Ratz

Fighting Style: Boxing and Krav Maga

Book: A Shield Called Hiroshi

Hiroshi Onigahara does not need to be loud to be terrifying.

Quiet, controlled, fiercely loyal, and dangerous in a way that makes people lower their voices around him, Hiroshi is the wall his family hides behind. Around Boston Chinatown and Harborview High, he is known as KO, the pretty boy with calm eyes, fast hands, and a reputation for ending fights before most people realize one started. But to his family, he is Bubba.

That name belongs only to the people who know the boy underneath the silence. Ronin’s twin. Jade’s shield. Vincent’s anchor. Hitomi, Yoshi, and Kenji’s son in every way that matters. Hiroshi grew up in the same cramped apartment, the same chaos, the same love, and the same survival-born loyalty that shaped all the Onigahara kids. Where Ronin is the storm, Hiroshi is the volcano.

He holds everything in. Anger. Fear. Love. Grief. The urge to protect. The need to control every room before it can hurt the people he loves. He is not emotionless. He feels too much, so he keeps it buried under discipline, silence, and fists trained to hit only when necessary.

Hiroshi loves with absolute loyalty. He watches exits. Reads body language. Steps in front of danger before anyone can ask. He can be funny in a dry, devastating way, but most people only see the quiet boy with the pretty face and the warning in his eyes.

They usually underestimate him once.

Hiroshi’s story is about anger, restraint, family, protection, codependency, and learning that being the shield does not mean turning himself into something that cannot break.