Koala[7] is a former slave who was set free by Fisher Tiger's rampage on Mary Geoise. She sailed along with the Sun Pirates to reach her home town.
At some point later, she joined the Revolutionary Army, eventually becoming the Fish-Man Karate assistant instructor and high ranking officer. She now often works alongside both Sabo and Hack.
She made her reappearance during the Dressrosa Arc.[2]