From the announcement:
She's been sculpted for us this year by the excellent Derek Schubert. Sophie will be availabe here at ReaperCon, in the swag bag you get for registering, and in our online store for the duration of the con. So, really, there's no good excuse to not get one for yourself.
Speaking of Sophie, here's Tim "Talin" Collier's rendition of her for this year: