|Episode count||1 Episode|
|Played by||Miriam Margolyes|
Together with her husband they are vegetarian and religious fanatics. The two, but mostly her, are comically revealed to be very devout, dressing in white clothing with helmets crowned with crosses, and wearing four large crosses each. Both are exceedingly condescending. She comes to visit Edmund with her husband, as they want to discuss with him any of his heritage. At that time he has, a beer feast with Lord Melchett, and therefore must dine with his aunt and uncle in one room and get drunk in the second. Eventually, they discover Blackadder's drinking party and leave (though not before Lord Whiteadder renounces his vow of silence and thanks Blackadder), only to run into the party in the main hall.
The following morning, Lady Whiteadder appears from under the gown of Queen Elizabeth I in a state of intoxication.