Zeku

Master Zeku (師匠 是空 / ゼクウ) is a non-playable character from the Final Fight series. He was the 38th Successor of the Bushinryu Ninjutsu school. He became the Grandmaster after defeating his former teacher Genryusai, but refused to kill him as the Bushinryu commandments deemed because he saw him as a father. Although the Genryusai focused on Ninjutsu, Zeku improved the style by incorporating a variety of Taijutsu techniques on it.

Zeku then became the teacher of Guy, and taught the young Japanese-American ninja all he knew. Eventually he and his student would battle to see if Guy was worthy of being the 39th Successor of the Bushinryu school. Guy won, but like Zeku before him, he didn't kill him. Zeku was proud of his disciple and ordained him the 39th Successor of Bushinryu Ninpo. He then disappeared and was never seen again.

Trivia

 * In the UDON comics, Zeku is portrayed with a moustache.