The thingy on the chain is the weapon she uses. she actually throws the dart end into the opponent. She is a really kick ass antagonist in the series. Her name is Rider from Fate/Stay...
Thank you, both of you! But... I like roasted squirrel.. and squirrel stew, and squirrel gravy... *goes on a rant like Bubba Gump did about the recipes of shrimp*