Leviathan
Japanese title: リヴァイアサン
Type: ONA
Source: Novel
Episodes: 12
Status: Finished Airing
Aired: Jul 10, 2025
Duration: 24 min per ep
Studios: Orange
Producers: Sonilude, Qubic Pictures
Genres: Adventure, Sci-Fi
Themes: Crossdressing, Historical, Mecha, Military

Set in a war-torn reimagining of 1914, Leviathan follows Alek, a fugitive prince of the Austro-Hungarian Empire, and Deryn Sharp, a daring young girl disguised as a boy to serve in the British Air Service. When fate throws them together aboard the HMS Leviathan, a massive, living airship made from genetically engineered creatures, they embark on a world-changing adventure that will challenge everything they know about war, loyalty, and identity.

(Source: Netflix)