Deanna is one of the secret characters that can be unlocked in the Wreck-It Ralph section of Disney Crossy Road! In order to unlock her, all you have to do is unlock the 'Citizens of Niceland' set of characters. These characters include Ralph, Felix, Gene, and Mary. Once you unlock these characters (in no particular order) you will unlock Deanna!
If you know how to unlock any other Disney Crossy Road Secret Characters, make sure to tell us in the comments below!