Hmm. It's worrying when I find myself in sympathy with a supervillain! Yet, as Chrismas approaches, finding one who is convinced that Christmas is over-commercialised does have some resonance...
This is a brief present, being a freebie, that provides a neat, seasonal, supervillain should you be planning a 'Christmas Special' adventure. She's a young lady with an unfortunate name and the knack for telling if someone is lying or has been bad (or for that matter tells the truth and is good), which made her quite unpopular growing up... but, if you recall European traditions of Saint Nick, from whence the Santa Claus legend arose, he too could discern how well a youngster had behaved over the past year, and presented a present or coal as appropriate.
Her activities, which any bunch of good-hearted superheroes should wish to prevent, include eliminating the hordes of false Santas that infest shopping malls and replacing naughty children's presents with boxes full of coal. There are a few more suggestions as well, particularly if you wish for a darker game. Worthy of a one-off, particularly if you intend a Christmas Special.
Present, not coal.