Obaba is the oldest living human alive on Airan Island and is the village chief. She was among those that originally survived the sinking of the ship that stranded the inhabitants on the island over 130 years ago.
Obaba is a supporting character in the Nagasarete Airantou series that was created by Takeshi Fujishiro. The series first began serialization in Square Enix's Monthly Shōnen Gangan magazine in January 2002.
Her first appearance was in Nagasarete Airantou Volume 1 CH. 1 "Drifted Away", and her first anime appearance was in Nagasarete Airantou - Episode 1 "Drifted to Paradise!?". Her character in the Japanese series is voiced by Kujira.