* First appearance: Battle 266
* Type: Sei
* Type: Satsujin Ken
* Martial Arts: Chinese Kenpo

Ro Jisei was one of Ma Sougetsu's old friends and, according to Ma Kensei, was responsible for leading him down the path of the Satsujin Ken.

He was a member of Yami and Chou Enshin's master. He is a member of the One Shadow Nine Fists while Ma Sougetsu is not present.

Ro first appeared with his features mostly hidden during the One Shadow Nine Fists meeting after the death of Kanou Shou, to which he expresses his belief that Shou wasn't worthy of inheriting his techniques without explicitly stating his reason. After that, he doesn't appear again until his disciple's match against Tanimoto Natsu. Ro and Sougetsu watch the fight until Tanimoto wins the match and earn the Moon symbol of Yomi.

Ro's fate as well as Chou's after they are replaced is unknown, but it is implied that he is either training his disciple or is in search for another disciple after his own was disposed of.