The cast of characters from Buffy the Vampire Slayer offers many lessons for open source communities. Buffy did not volunteer to lead a team. Instead, she was the "chosen one" and had to grow into her leadership role. Other characters illustrate how energy demons drain communities, how trolls can become valued contributors, and how mentoring helps team members excel. Using main characters from Buffy as examples, we'll discuss how the lines between good and bad blur when it comes to communities. Attendees will leave with a better appreciation for how diversity helps create vibrant, exciting, healthy open source communities.