The Twin is the Archetype that most closely resembles your own. So if Sally Hogshead is The Catalyst (Passion + Innovation), her twin is The Rockstar (Innovation + Passion). Your Twin could be you on a different day, in a slightly different situation. When creating your Anthem you can pull adjectives from both your Archetype, as well as your Twin. For a detailed explanation of both Archetypes and how they fascinate differently, read part II of How the World Sees You. If you would just like to see the different adjectives associated with your Twin, look them up on the Archetype Matrix.