#5 – EMPORIO IVANKOV
Emporio Ivankov is the “Queen” of the Kamabakka Kingdom and is one of the commanders of the Revolutionary Army.
Sanji developed a friendly (of sorts) relationship with the entire populace of Kamabakka Kingdom after being sent there against his will by Bartholomew Kuma. Ironically, this bond initially started out as “hell” for Sanji, but later improved overtime as he assimilated (to his chagrin) with their lifestyle. This relationship further bettered upon meeting their then-newly freed leader, Emporio Ivankov.
By the end of the two year timeskip, it has been shown that Sanji has already won the 99 recipes of Kamabakka Kingdom’s Attack Cuisine as prizes for managing to defeat the Okama Kenpo masters on Momoiro.
#4 – MONKEY D. GARP
Monkey D. Garp is an extremely famous and powerful Marine Vice Admiral. He is the father of Monkey D. Dragon and the paternal grandfather of Monkey D. Luffy.
Garp is the mentor/instructor of Coby and Helmeppo; he keeps them out of trouble and ensures that they are not slacking off. If they do get out of hand, he knocks them around to ensure they know their place. Coby admires Garp, even though he maintains a highly brutal clutch on him because he would not be where he is without him.
#3 – DRACULE MIHAWK
Having lost one rival in Shanks, Mihawk now shares a rivalry with Zoro, and is prepared to wait as long as it takes for Zoro to become strong enough to beat him. To this end, Mihawk watches Zoro’s progression and is delighted when Zoro gains his first bounty.
After the Battle of Marineford, Zoro is willing to put aside his pride and begged Mihawk to train him in order to become stronger for his crew. Mihawk tells Zoro to go, because he believes that such an idea is foolish and he assumes that Zoro is simply incapable of defeating the baboons. However, Zoro had already defeated the baboons, and wanted Mihawk to train him so that he may one day defeat Mihawk himself. He notices that Zoro is putting his pride aside all for the sake of his captain. Mihawk gives in and tells Perona to heal Zoro so they can begin his training, which takes place during the next two years.
During the Dressrosa Arc, it is revealed that Mihawk taught Zoro how to imbue his swords with Haki.
#2 – MONKEY D. DRAGON
Monkey D. Dragon, commonly known as “Dragon the Revolutionary”, is the father of Monkey D. Luffy and the son of Monkey D. Garp.
After joining the Revolutionary Army, Sabo was personally trained by Dragon and attained tremendous physical prowess by adulthood.
So Dragon enabled him to rise through the ranks until he became the Revolutionary Army’s chief of staff.
Sabo refers to Dragon as “Dragon-san” and is loyal to him and is trusted enough to lead the Revolutionary Army’s investigation of Donquixote Family’s weapons trade. Even after regaining his memories, Sabo did not leave the Revolutionaries to resume his dream of being a free-sailing pirate, showing a firm conviction to Dragon’s cause.
#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.