Amy Hall (also known as DNAmy) is one of the world's foremost genetic engineers, with a special talent for gene splicing. She is also an avid collector of Cuddle Buddies, a beanie baby pastiche that generally consists of two different animals combined into a single plush toy.
Amy adores cute things, and peppers her speech with little expressions that would be cute if she was 4 instead of 40 (For instance, she refers to people she dislikes as "meanies"). She is also extremely susceptible to flattery, and has had crushes on several men over the course of the series.
She is not particularly villainous. Although her gene-splicing experiments are ethically dubious at best, she generally has no intention of doing anything evil with the monstrosities that she creates.