When choosing an anime AI video generator, the key difference from general AI video tools is that anime generation must protect character identity—such as linework, eye style, and design details like a fang or stocking pattern—rather than prioritize realism, physics, or lighting. General-purpose video models trained on live-action footage often soften linework, drift eyes toward generic anatomy, and shift color palettes toward photographic looks, failing to preserve non-negotiable character elements. Before evaluating resolution, length, or price, users should first check if the tool keeps a character recognizable when moving, as a single inconsistent frame—like an eyepatch jumping to the wrong eye or a hair streak vanishing—can break the illusion. No tool achieves perfect consistency in every generation, and complex motion like leaps or spins is harder to hold together than a slow head turn; a good generator is distinguished by how often the character survives ambitious motion. For users with an existing character image, a text-only video generator is the wrong tool, as describing an OC in words and hoping the model reconstructs her from scratch leads to spending more time correcting details.