Age: Unknown
Family: Tom (son)
Occupation: Mother
Name Means: Bitter
Episodes: (1-2) Awakening/ (21) Avalon pt 1
Voice: Kath Soucie

Mary was anti-gargoyle in the beginning but had a change of heart and ending up prtecting them like her son Tom.  When they tried to escape to Avalon, Mary joined Finella in taking the Grimorum away and ending up time traveling and convincing Xanatos to purchase Castle Wyvern in the first place.