Escher (ESCH) is the governance token for Ubiq, a decentralized smart contract platform. ESCH is used to represent a users voting weight when voting on proposals that determine the future direction of the platform.
You can add ESCH to fusion like any other token. On the Contracts tab in Fusion, scroll to the bottom and click the Watch Token button. Enter the Escher token contract address into the Token Contract Address field, the remaing fields will auto complete (e.g Decimals: 18). Click the OK button. You will now see an ESCH balance for any addresses containing ESCH.