Disco

Disco was the owner of the Human Auctioning House at Grove 1 in Sabaody Archipelago.

Appearance
Before the timeskip, Disco was a thin, eccentric man who had long silver hair, a yellow hat, and his trademark star-shaped glasses. He also wore a purple coat and a pink scarf.

After the timeskip, Disco has lost his business and has become ragged-looking, with torn clothes and a scruffy beard and hairstyle. He now wears torn black boots and a ripped shirt and shorts. However, he still maintains his hat and glasses.

Personality
He is a brutal person, who abused and kicked Keimi when she was first brought to him.

Sabaody Archipelago Arc
He was responsible for the human auction where the Straw Hat Pirates went to save Keimi. He was the one who presented the slaves to the buyers. After all the mess that Luffy and the Straw Hat Pirates made he was seen furious.

When Silvers Rayleigh broke his chains with Haki, he used Haki to knock out the rest of the soldiers in the auction, including Disco.

He was later seen injured (the anime showing it was Shalulia that caused it when Disco was inquiring about payment for Keimi during the chaos), calling the shop's owner, Shichibukai Donquixote Doflamingo for help - but after the latter told him he could have the shop, as Doflamingo wasn't interested in it anymore because the government was calling the Shichibukai to battle against the Whitebeard Pirates, much to Disco's horror.

Two Years Later
Two years later, Disco is seen in complete disgrace, living like a vagrant, stabbing the wanted posters of Luffy, Eustass Kid, Trafalgar Law, and Roronoa Zoro.