Yes, if you registered your WEBTOON account with an email/password login, you can change the email associated with your account. Follow these steps:
- Open the app and go to "Settings."
- Under the "Account" section, click on your email address.
- Select "Change email address."
- Enter your current WEBTOON password and your new email address.
- Click "Change email address."
- Check your new email inbox for a verification email.
- Click the "Verify your email" button in the email.
Your email address should now be updated.