Big Top

Big Top is the owner of and allegedly the most powerful man in the Oasis. Big Top seems to be an effective leader of the Oasis, with Roulette saying he is the reason why the Marines don't interfere with the business going on in the Oasis.

Appearance
Big Top is a short man with a ginger beard who looks similar to a leprechaun. He also carries a cane, which has a concealed gun inside of it.

Personality
Very little is known about Big Top's personality. Roulette claims that he is "small in size but large in character." He speaks with an Irish accent. He is adamant about maintaining the status quo in the Oasis, punishing those who would threaten it with unforgiving cruelty. He also doesn't tolerate insults against his person, as when William envisioned him as "clowny", Roulette warned the pirate to not let Big Top hear him say that, claiming that he "has a temper." Any person who would steal from him will be dealt with swiftly.

Overview
It is unknown how physically strong Big Top is, but he does have many connections, wielding more economical and political power than any of the Casino Dons. He has endless amounts of wealth and manpower at his disposal. His influence is great enough to keep the Marines out of the Oasis, causing them to have no jurisdiction there. He is also one of the only people in the Oasis who is actively keeping tabs on the Eight Flames and their whereabouts, being aware of the location of their current base at all times. He is also capable of hiring them to kill anyone for him at any moment. All of this makes him a very powerful and dangerous man.

Devil Fruit
Big Top has eaten a devil fruit in the past. According to Dane Goodman, this fruit is similar in function to the Roulette Roulette fruit, except that it uses dice to give Big Top "any number of abilities".

Slots and Pipp
Slots and Pipp were some of biggest allies, as they were willing to give their lives in order to protect him. However, once Slots' life was in danger, Pipp fled with Slots.

Enemies
The Casino Dons

The Casino Dons are an instrumental existence when it comes to maintaining the balance and integrity of the Oasis. As such, Big Top has made endangering their businesses or attacking them personally into one of the few unforgivable crimes that exist within the confines of the city. Overall, Big Top and the Dons maintain an alliance that mercilessly punishes anybody who disturbs the uneasy order of the Oasis. However, after the Crew left the Oasis Big Top helped continue the gang war between them in order to weaken them, until only one remained, in which case he could rush in and rule the Oasis unopposed.

Bullet
Big Top hates Bullet as she stole the Roulette Roulette no Mi from him, breaking one of the only rules that the Oasis has. As a punishment for her crime, she was banned from entering the city ever again. In the 1 Million subscriber Twitch stream, Rustage confirmed Bullet was actually Big Top's adoptive daughter.

Devil's Luck Pirates
Big Top presumably hates the crew for assaulting the Elephant and his business, threatening Roulette's life and stealing her diamond as well as attacking the Eight Flames Base. Although given recent interactions, he might not care about that. He was willing to take a hostage and coerce the crew into being mercenaries in order to kill the Dons, meaning he might just view them as a pirate crew he can use for his own ambitions.

Trivia

 * Big Top is the first person to wield a cane weapon in the story.
 * Interestingly enough, Big Top shares his name with the main ship of the Buggy Pirates from the main One Piece story.
 * Coincidentally, Big Top's aesthetic is very similar to that of Oswald Chesterfield Cobblepot, more commonly known as The Penguin, a fictional supervillain appearing as a frequent adversary of the superhero Batman in comic books published by DC Comics, although he was not inspired by him.
 * Big Top was inspired by Leprechauns.