The email address associated with your DS account will change & default to the primary email address of the device you are launching the account from. We cannot lock an email address to a DS account.
If you wish to change your email for your account, please take the following steps:
1. Please make sure you have first connected a recovery method to your DS account by tapping on your portrait in the top left of the main screen > Accounts > 'at risk' > connect to Facebook, G+ &/or Game Center. (Ideally all recovery methods available to you)
2. Then exit the app and connect the email address that you wish to associate with your DS account directly to your device as the primary email address. (this is done through your device's settings; using an email application to access your email will not work for account recovery purposes)
If you do not see your DS account upon initial launch of DragonSoul after this procedure follow these steps:
Tap on Profile > Tap "Accounts" > Tap "Lost Account" at the bottom of screen > Connect to recovery options.