Ginrummy

Gin Rummy is a Pirate who is member of the Beasts Pirates, working under Kaido.

Appearance
Gin Rummy is a dark-haired woman who wears little clothing, limited to two pieces of armor covering her breasts, a thong, a pair of gloves and an open black cloak. She also has a pair of small, black horns on her head.

Abilities and Powers
She appears to hold some sort of authority in the crew, as some of the lower members of the Beasts Pirates were seen taking orders from her.

Trivia

 * Like Jack and Sheepshead, Gin Rummy is also named a card game term.