Amazon was the elderly gatekeeper of Skypiea and informer at the entrance to Skypiea known as Heaven's Gate. She let people in even if they could not pay her extol toll, but purposely failed to tell those who did not pay about the consequences for entering the city.
After the timeskip, she became the admission ticket saleswoman for Skypiea's new theme park, Wagomuland.
Amazon is a short very elderly woman with an extensively wrinkled face. She has purple hair, put into two buns. She has thin arms, and wears a pink tunic, and has small white wings on her back like all Skypieans.
After the time skip, Amazon has part of her hair put into two buns, and part hanging down. She is also wearing lipstick.
An Zengaiina is a prisoner on Level 2 of Impel Down.
Zengaiina is a man with fair skin, short light brown hair, tiny black eye irises, hollow sunken black eye baggages, and stitched patterned scar on the upper right side of his forehead. He wears the standard white prisoner outfit with black horizontal stripes, trousers, and white shoes.
Though Zengaiina hated Impel Down, he was too afraid of the Sphinx to leave his cell when Monkey D. Luffy and Buggy tried to break him and his fellow prisoners out.
He and other prisoners were freed from their shackles and cells by Buggy and Luffy. However, after hearing the roar of the Sphinx, he chose to stay in his cell out of fear.