A pretty girls name. Usually given to Dark Witches bent on destroying the world. ;)
"What happened, Serenity? Why are you doing this?"
"You happened! I don't appreciate being controlled, I'm not a chess piece and I'm certainly not a part of your little game, headmaster!" Serenity spat, hatred rising up in her body.
(Snippet from a fanfiction story called "The Witching Hour")