Ginrummy

Gin Rummy is a member of the Beasts Pirates and member of the crew's Gifters division, working under Sheepshead.

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.

Personality
She seems to be a cautious person as she ordered her crewmates to retreat right after Sanji defeated Sheepshead instead of battling him and the other Straw Hats.

She assumes that all warriors from Wano should be referred to as samurai even though the man they were after is actually a ninja.

She seems to be embarrassed by prevented people as shown with Sanji.

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.

Past
The Beasts Pirates, led by Jack, arrived at Zou, searching for a ninja called Raizo. The pirates threatened the Mink Tribe, who were unable to comply with their demands. Not willing to listen to reason, the Beast Pirates attacked Zou. The Mink Tribe fought back until Jack used one of Caesar's poison gas weapons.

Dressrosa Arc
Gin Rummy and her crewmates first appeared chasing down Nami, Brook, and Momonosuke. After Sanji defeated Sheepshead, Gin Rummy told her other crewmates to retreat and told them to report that Raizo was not there.

Trivia

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