"Oh, don't worry," Pumpkin assures you. "That's just Gwen the Evil Unicorn, from Totsy. She looks pretty evil, but she's really harmless. Fakie unicorns don't have very strong powers at all."

So why the name Gwen?

"We wanted to think of an evil name for this evil unicorn. The worst Lady Minty could come up with was Gwyneth... But she couldn't bear to name any pony, not even an evil one, that. No pony deserves a name that evil (Minty's not a big Gwyneth Paltrow fan, in case you don't know her well). So, Gwen it became."

Bwahaha!