Cassidy Williams

Cassidy Williams is a former member of the original Mystery Incorporated. She was eventually revealed to be Angel Dynamite who was working with Mr. E, seemingly to protect the new Mystery Incorporated.

When she was a teenager, Cassidy had romantic fantasies about Ricky Owens, which she wrote about in her diary. Velma Dinkley is the modern counterpart of Cassidy (at least in terms of their looks and romance with the hippy of the group, as Professor Pericles was the smart one of Cassidy's group).