#1 – SILVERS RAYLEIGH
Rayleigh mentored Luffy on how to master all three different forms of Haki. Luffy strongly respected Rayleigh as a teacher as he was even willing to endure hunger as punishment.
Before training under Rayleigh, Luffy displayed limited to no control over his Haoshoku Haki, and did not seem to realize he had it, but used it on instinct whenever it seemed to be most needed, and could still use it even when extremely injured. With this training, Luffy has demonstrated the ability to focus his Haoshoku Haki. The true extent of Luffy’s Haki is seen when he knocks out 50,000 of Hody Jones’ men.
Since training with Silvers Rayleigh, Luffy have gained incredible proficiency in Kenbunshoku Haki and Busoshoku Haki.