Leviathan

In an alternate steampunk past, a fugitive Austrian prince on the run crosses paths with a Scottish airman who is concealing his true identity. When a chain of incidents threatens to tip fragile peace into all-out war, the two form an uneasy alliance to trace the people and machines pulling the strings. Their search takes them across floating cities, crowded battlefields and mechanized skies, where spies, rival nobles and monstrous contraptions complicate every step. The series keeps the focus on political maneuvering and character friction, revealing just enough about motives and loyalties to maintain tension without giving away major twists.

Created by Scott Westerfeld, Leviathan premiered in 2025 as an animated action and sci-fi series. The principal Japanese voice cast features Ayumu Murase as Prince Aleksandar, Natsumi Fujiwara as Sharp, and Mie Sonozaki as Dr. Nora Barlow, among others.

Though still new, Leviathan has attracted a niche fanbase drawn to its detailed steampunk aesthetic and airship combat. Online communities have been sharing fan art and scene breakdowns, and the show’s visual design has sparked conversation about how alternate history and fantasy can be blended in animation.

Early reactions are mixed, reflected in a 6.2/10 average from a small pool of viewers. Critics and fans who respond positively highlight the series’ themes of class tension, identity and the morality of warfare, plus its brisk action sequences. Detractors point to uneven pacing and some underdeveloped supporting characters.

As of early 2025 Leviathan has not received major industry awards or prominent nominations. It remains a fresh entry in animated sci-fi and fantasy, with potential to grow its profile if later seasons expand on the worldbuilding and tighten narrative focus.