Mary is Murray and Miss Decibal's daughter and one of Sydney's best friends. She has pink skin and purple eyes.
Like her father, Mary wants to be a wrestler. However, she loses this interest after learning how violent the job is. Mary is described as being gentle and friendly with her friends and even likes to play fight with enemies. She has been described as a happy-go-lucky and enthusiastic hippopotamus. She is the most genial character in the group and is very kind, friendly, encouraging, and outgoing. She speaks with a surprisingly soft demeanor despite her size and is happy to be part of the Allstar Rangers. When trouble is afoot, she shows tremendous strength and courage and does not hesitate to charge enemies.
Mary is immensely strong, strong enough to pick up large robots and throw them at other enemies. Her stomps can also send shock waves through the ground.
Trivia:
Mary is possibly named after her father.
She is one of the strongest female members of the Allstars.
Mary's favorite food is peanut butter.