Zurvas Al Merik

Zurvas is the Red Eyed Pirates' quartermaster and the 10th member of the crew.

Yontoryu
Zurvas uses two two sided swords with a total of 4 blades being commissioned whenever he fights. So technically he is a 4 sword style swordsman and uses this style effectively.

Red Eyed Pirates
Zurvas was marooned on a small island the size of a small house in the middle of the Grand Line when Tōshin and the crew found him half dead and unconscious. They took him on board and when he woke up, they fed him. They asked him what happened that put him on that island and he said he couldn't say because it would put them in danger too. Yoru asked where they should drop him off and he said whatever island they were going to next would be fine. Unfortunately, the next island they got to was a beach city island where a trap was waiting to be sprung the moment Zurvas stepped on the island. It was revealed by the soldiers who sprung the trap that he was the son of a big revolutionary, Ubytsa Al Merik. For that reason, he was being taken to execution. At that point Zurvas was warped away before Tōshin or anyone else could do anything. Using deductive reasoning, they guessed that he was being taken to Impel Down and if he was being taken by ship, all they needed to do was to intercept that ship. They quickly started riding their boat towards Impel Down and intercepted the boat just as Impel Down came into view, rescued Zurvas just as navy helper boats started being launched and rode off shaking off their pursuers. They returned to the beach city island where Zurvas realized that he had nowhere else to go and would rather be with nobody other than the Red Eyed Pirates crew. He sought them out and begged them to let him be in the crew, to which they accepted.

Notoriety
Zurvas's bounty scales with everyone else's, his first bounty being 40,000,000 berri, his second bounty being 187,500,000 berri.