In the example above, Teresa Clarke is assigned to this specific record in the UTA Role of "Manager."
Teresa's contact profile need not have been assigned the role of "Manager" in order for her to play the role of a Manager in the context of this specific UTA record.
User Roles can be defined as "UTA Roles Only" on the edit page of the role from the Roles & Permissions page. This means that the role will not be able to be assigned to a contact's profile, but will be able to be selected as a role when a contact is assigned to a UTA record.
Individual contacts can be added to a UTA record with multiple roles, though only once per UTA object per role. See also Contact Restriction.