I have created a CiviCRM Cases View. How would I add a column for "Case Manager" role to the Views? I am unable to find the field where that can be displayed.
Actually you'll need to start with a CiviCRM Relationships View.
If you start with a view of CiviCRM Cases, you may get bad data if they have multiple open case types with different case managers.
So create a new view of CiviCRM Relationships, then in the advanced section add the Case ID relationship, then add the Contact A (the client) relationship and finally the Contact B (the case manager) relationship.
Add a Display Name field using relationship Contact A, then add another Display Name field using Contact B.
Here are all of the fields I eventually added: