Ethana (エタナ) is a lieutenant in the Royal Army. Ethana loyally serves Kelb; however, she is somewhat more open-minded towards Jil and the other climbers and supports Jil's quest by providing him a bag of gold in hopes of recruiting more climbers.

She is shown to have survived the waterfall that is released by Kaaya and Neeba's ascension of the tower in The Tower of Druaga: The Aegis of Uruk and continues to serve in the Royal Army. Though she appears obedient in the presence of Amina and King Gilgamesh's advisors, Ethana secretly had doubts concerning King Gilgamesh's condition and ability to continue ruling Uruk. In episode 9 of the Tower of Druaga: The Sword of Uruk, she leads a rebellion against King Gilgamesh when the King changes drastically into a more ruthless tyrant. At the end of the series, Ethana reunites with Kelb and they get married.