Leviathan

Set in an alternate, steampunk-infused 1914, the anime Leviathan weaves the fates of two extraordinary teenagers. Alek, a fugitive prince on the run from his own empire, crosses paths with Deryn Sharp, a courageous girl disguised as a boy to serve in the British Air Service.

Their destinies collide aboard the HMS Leviathan, a breathtaking living airship constructed from genetically engineered beasts. Thrust into a globe-spanning conspiracy, Alek and Deryn must navigate a world at war, where secrets are as dangerous as enemy fire. This adventure challenges their deepest beliefs about duty, friendship, and the very nature of identity in a society bound by rigid rules.