"Character" refers to the (humanoid) model data registered in VRoid Hub by setting a name and profile.
A character is not mere data, but treated as an individual, with its own existence, traits and personality.
In VRoid Hub, you can register multiple models as part of the same character.
For example, you can add the model data of a girl with black, long hair and, based on it, model data of the same black haired girl in a uniform, with cat ears, or of the same girl but with silver long hair instead. If multiple models are registered under the same character, they can all be displayed on the character's page.
The character's name, personality and profile set by the creator are shared among all models. Usage conditions can be set separately for each model.