Is there a way to purchase Character Animator on it's own?

CH is currently only available as part of the Creative Cloud All Apps plan. While we hope this changes one day in the future, for now CH is very reliant on other programs (PS/Fresco/AI for artwork, AME for export, PR and AE for dynamic linking, etc), so the majority of people tend to already be using it with several other Adobe apps.

I think it is only available in the bundle, not separately.