"Iron Mace" Alvida[1][7] is the former captain of the Alvida Pirates and the first antagonist encountered by Luffy on his journey after going to sea.[1] Due to her actions, she can be regarded as the secondary antagonist of the Romance Dawn Arc and the tertiary antagonist of the Loguetown Arc.

After her defeat against Luffy, she allies with Buggy and becomes one of the two captains of the Buggy and Alvida Alliance. She was the acting captain of the crew during Buggy's time in Impel Down and during the Summit War of Marineford. After reuniting with Buggy, his army of Impel Down Convicts, and Galdino (and with the addition of Buggy becoming a Warlord of the Sea), her alliance with him has evolved into the underworld organization known as Buggy's Delivery,[3] and once again when that organization was re-integrated into Cross Guild.[2] After eating a Devil Fruit, Alvida has transformed by shedding the excess weight from her body. The Sube Sube no Mi makes Alvida very slippery and, aside from the cowboy hat she wears, Alvida looks totally different from her original form, being slim, well-endowed, with dark-green eyes (before brown), while maintaining her original hair.[8]

She still has her cowboy hat, but she now dresses in a pearl necklace, a bikini top, and tight Capri-length pants. She sometimes has a purple coat draped over her shoulders. She wore a pair of sandals (shoes later in the Post-War Saga in the anime), and now tends to wear shoes that can slip off easily so she can use her Sube Sube Spur technique with the slippery soles of her feet. She still wears lipstick, polish on her now shorter fingernails, and her toenails are shown painted as well (something that before was not visible before due to her shoes). During her appearance in Loguetown, she also had a cape-like, pink cloak with red hearts on it.[8]

Most people that see her actually fall in love with her (as seen in Loguetown, even women), similar to Boa Hancock. Delusional (or, most likely, in denial) about her former appearance