The latest version of Character Animator is described on the following page: What's New in Character Animator
Also, see the system requirements for Character Animator CC.
Character Animator CC is installed via the Creative Cloud apps catalog or desktop app, and is available as part of an All Apps plan.
To update to the latest versions of Character Animator:
If a Preview or Beta version of Character Animator is currently installed, Character Animator CC will not appear as an update but instead as a separate app to install.
When Character Animator CC is installed, Adobe Media Encoder CC is also installed to easily render movies of your scenes.
After Effects CC no longer automatically installs Character Animator CC, so install it separately if needed.
If you encounter issues updating to the latest version, see Error downloading, installing, or updating Adobe Creative Cloud apps.