The "MDG" designation is often associated with "Model of the Dreamgirl," focusing on creating idealised, high-fidelity representations of various character archetypes. The series, specifically, marked a significant year for the brand in terms of production quality and artistic direction.
: If Cindy is a character from a digital art series or a virtual model, communities like DeviantArt, ArtStation, or official Discord servers might have the information you're seeking.