Sinbad is the King of Sindria. He is a Dungeon Capturer, having captured seven Dungeons, and a King Vessel. He is also the leader of the Seven Seas Alliance. Sinbad has already halfway “fallen into depravity”. He is often accompanied by members of the Eight Generals who are his most trusted companions.
Sinbad is a laid back and fun-loving person. He is somewhat infamous among his subjects for getting drunk and doing outrageous things, to the point that even his closest friends don’t believe him when he says that he didn’t take advantage of a young princess under the influence. He can be quite a flirt and is not above using his charm to get what he wants. He tends to remove his clothes when asleep.
Despite all this, he can be serious when the need arises and is a great and honorable king who is respected and admired by everyone, especially his subjects (whom he seems to consider a sort of extended family).
Sinbad is one of the most powerful characters in the entire series. He is extremely skilled in swordplay as well as Magoi Manipulation, and has decent martial arts skills as well. He, Kouen Ren, and Hakuryuu Ren are the only known King Vessels to have more than one Djinn.
Though he does altruistic deeds for other people seemingly without thanks, later it is revealed that he helped Alibaba Saluja, Aladdin, and Hakuryuu Ren because they represented powerful potential allies in his battle against Al-Thamen. When talking to Ja’far, he realizes that he became a sly person after accomplishing too many things and is now the person he never wanted to be.
Notably, he has already halfway fallen, enabling him to use black magoi as well as white magoi.