First off I hate using the word sexy, especially if I am describing a Tom Nook Cosplay, but in this case, I do not know how else to describe this costume…
To sum up the costume Erika has decided to turn Tom Nook into a financial Dom.
If you have never played Animal Crossing then this one might confuse you. So in Animal Crossing, Tom Nook is your major source of resources. And you will end up massively in debt to him. To the point that every time you finish a project he will immediately offer you a loan towards another one. He basically traps you in a never-ending cycle of capitalism. And the cycle can be both vicious and addictive.
And Financial domination (also known as findom) is a fetish lifestyle, in particular practice of dominance and submission, in which a submissive (money slave, finsub, paypig, human ATM, or cash piggy ) gives gifts and money to a financial dominant (money mistress, findom/findomme, God/Goddess or money domme).
As costumes go this one is perfect for Erika as they are a lover of Animal Crossing, they are also someone who is sex-positive and most of all Erika has a bubble of fun charisma around her that really shows in everything she does.