Sasha is right. Angelo uses a Katana because 1: It's a gift from Faelean and 2: It reduces his chance of creating Paradox. Curved swords hold a special meaning to the Mages of the Mastigo path, representing how Pandemonium works in odd, non-linear ways. He could also use a whip...but that's a little, you know, weird.<br/><br/>So no, he does not use it simply because it's 'cool'.<br/><br/>EDIT: Do I detect the slightest hint of attraction coming from Selene?