▼ To use another user's character
Log in to VRoid Hub (if necessary, create a new account first).
Like the character you would like to use on VRoid Hub. If the usage conditions allow it (*1), characters you liked can be imported and used on connected apps.
*1 ... For example, if a character's usage conditions prohibit violent acts, the character cannot be used on apps involving violent acts.
A list of currently linked apps can be viewed from the top page of VRoid Hub.
▼ To use your own characters
You don't need to like your character in order to use it. You can import your own characters directly on connected apps.