Board Thread:General Discussion/@comment-11188061-20141008045121/@comment-10380701-20141027002615

Velvet was a one-off character.

But she became super popular to the fans (because bunnies, man) that she became a major character and three new characters (read: her teammates) were created. And now, she's part of CFVY.

If for example, Velvet didn't become popular, then CFVY would just be a nameless team of second years (or at least, vastly different characters from CFVY altogether) who came back from a shitstorm in episode 8.