*Important*
Backup Database before proceeding with the below.
Step 1: Create a new administrator.
Step 2: Fill in the required information. Use a different email for the new user. In the Role drop down select Administrator. Once done, click Add New User. The new admin will appear in the Users list.
Step 3: Log out and log in as a new Admin (Cassandra).
Step 4: Once logged in, navigate to Users and hover your mouse over Daphne. You will see the option 'Delete' directly under Daphne's Username. Click Delete and you will be asked to choose, delete all content or attribute all content to another Admin. Once you have chosen, hit Confirm Delete to remove Daphne Admins.
You've created a new Admin for your WordPress.