"She was my best friend. But close enough to be like a sister," Willow answers. Buffy's death is still hard to talk about, and she carries some guilt over not being fast enough, or strong enough to have prevented it. "But yeah. She was really brave. She saved the world a lot."

It's the butterfly who fields the question about the portal, as she has been any other time Willow herself has been reluctant. "There was this god from another dimension. Crazy strong and crazy... well, crazy. She was trying to get home and the only way for her to do it was to tear down the barrier between worlds. It would have unleashed hell on Earth. Buffy stopped her, but one of her acolytes was going to start the ritual. We tried to stop him, but we were too late. We should've noticed sooner."

The butterfly pauses. Apparently it's hard for her to talk about as well. "The only way to close the portal again was for either Buffy, or her sister to die. So Buffy jumped into it."