Mary-Beth presents herself as a kind and good-natured woman, and while this is certainly true she is also a competent thief and scam artist. Within the gang she is genuinely loving and considers most of them family. Mary-Beth is a devout bookworm, almost always seen reading a romance novel at camp, and even wants to become an author. She's insecure about her passion and always gets shy and bashful whenever someone asks about it, calling her work "silly". She is very gentle and loves romance.