She has mid-length coppery-blonde hair, ice-blue eyes, and likes wearing pastel colors.

Cass has been the first to go good. She realized her mistake when Sailor Twilight and Aurora found out that she was being controlled by a mysterious force within her. Sailor Solar used her healing attack on her and purged the force. Just as Cass was about reveal the reasons as to why the Four Blue Sisters had been chasing Sailor Aquarius, a mysterious force removed her memories.