OVA
Description
Katsumi Orochi, originally surnamed likely Katsuragi, first showcased extraordinary physical abilities as a circus performer at age five. A tragedy struck when a circus lion killed his biological father, the lion tamer. Witnessing the event, Doppo Orochi adopted Katsumi, raising him with his wife Natsue Orochi. Doppo began training Katsumi in Shinshinkai Karate, forging his early martial arts foundation.

Initially cocky and overconfident, Katsumi perceived himself as superior within the martial arts world, often displaying a smug demeanor. As a 3rd dan Shinshinkai prodigy dubbed the "Lethal Weapon," his early recklessness manifested when he provoked Yuujirou Hanma during the Pickle Wars Saga and toyed with opponents like Roland Istaz in the Maximum Tournament instead of decisive finishes.

Physically imposing at 186.5 cm (6'1") and 116 kg (255 lbs), he sports brown or black hair styled variably—frequently slicked back, sometimes under a baseball cap or scarf. A pivotal moment came during his battle against the prehistoric fighter Pickle, where Katsumi lost his arm. This injury led to surgery in Baki-Dou II grafting the arm of the deceased Chinese martial artist Kaioh Retsu onto his body.

His fighting style centers on Shinshinkai Karate, emphasizing powerful strikes and relentless offense. He developed the Mach Punch technique, executed at supersonic speeds, conceived with Doppo to challenge Yuujirou Hanma. He notably used it against Kaoru Hanayama, who endured multiple hits. Katsumi demonstrates tactical growth, feigning retreat to recover against Hanayama, and later conceding to opponents like Hector Doyle and Shishimaru upon recognizing their unyielding spirit.

Significant battles shaped his maturity. After a brutal defeat by death row convict Dorian, Katsumi attacked him with gasoline and fire. His near-fatal encounter with Doyle left him burnt yet defiant. The fight against Pickle marked a turning point; though he lost his arm, he emerged calmer and shed his arrogance. Before this battle, he reconciled with his biological mother, expressing gratitude for his physical gifts and vowing victory for both biological and adoptive parents.

Katsumi's relationship with Doppo Orochi resembles a friendly rivalry more than a conventional father-son bond. They competed in the Maximum Tournament, each aiming to win the champion belt for Natsue and prove whose karate style was superior. Mutual care is evident—Doppo prevented Katsumi from facing Dorian, citing dojo leadership while likely masking concern. Katsumi understood Doppo's unspoken pride and worry before the Pickle bout when Doppo waited in a horse stance.

As the dojo's leader following Doppo's loss to Gouki Shibukawa, Katsumi earned deep respect from students, who mobilized en masse to support him against Pickle. He maintains profound respect for opponents who refuse to quit, viewing perseverance as combat's essence. His personal philosophy values the body gifted by his biological parents and the upbringing from the Orochis, driving his commitment to karate and leadership.

Throughout his development, Katsumi evolved from a brash fighter into a disciplined mentor, balancing inherited physicality with hard-earned wisdom. His journey reflects continuous adaptation, notably through the surgical arm replacement, symbolizing resilience and the integration of others' legacies into his martial path.